5 Best Bitcoin Mining Hardware ASIC Machines (2020 Rigs)

NiceHash - buy & sell hashing power

NiceHash offers you to buy or sell hashing power directly, no contracts, no limitations, pay-as-you-go if you're a buyer and be-paid-as-you-go if you're a seller. Why bother renting rigs, when you can rent hashing power? NiceHash brings more to renters and rig owners. Visit https://www.nicehash.com today! Simply create order and you are already mining your favorite coin or point your rig to our stratum server and you are already earning bitcoins.
[link]

CoinRollHunting: the hobby of searching change pulled from circulation for collectible coins

This subreddit is a redirect to the /CRH subreddit.
[link]

UK Bitcoin Miner Eyes 240% Capacity Boost With New $10M Hardware Order

submitted by Ranzware to BitNewsLive [link] [comments]

UK Bitcoin Miner Eyes 240% Capacity Boost With New $10M Hardware Order

submitted by cryptolobe to cryptolobe [link] [comments]

Ultimate glossary of crypto currency terms, acronyms and abbreviations

I thought it would be really cool to have an ultimate guide for those new to crypto currencies and the terms used. I made this mostly for beginner’s and veterans alike. I’m not sure how much use you will get out of this. Stuff gets lost on Reddit quite easily so I hope this finds its way to you. Included in this list, I have included most of the terms used in crypto-communities. I have compiled this list from a multitude of sources. The list is in alphabetical order and may include some words/terms not exclusive to the crypto world but may be helpful regardless.
2FA
Two factor authentication. I highly advise that you use it.
51% Attack:
A situation where a single malicious individual or group gains control of more than half of a cryptocurrency network’s computing power. Theoretically, it could allow perpetrators to manipulate the system and spend the same coin multiple times, stop other users from completing blocks and make conflicting transactions to a chain that could harm the network.
Address (or Addy):
A unique string of numbers and letters (both upper and lower case) used to send, receive or store cryptocurrency on the network. It is also the public key in a pair of keys needed to sign a digital transaction. Addresses can be shared publicly as a text or in the form of a scannable QR code. They differ between cryptocurrencies. You can’t send Bitcoin to an Ethereum address, for example.
Altcoin (alternative coin): Any digital currency other than Bitcoin. These other currencies are alternatives to Bitcoin regarding features and functionalities (e.g. faster confirmation time, lower price, improved mining algorithm, higher total coin supply). There are hundreds of altcoins, including Ether, Ripple, Litecoin and many many others.
AIRDROP:
An event where the investors/participants are able to receive free tokens or coins into their digital wallet.
AML: Defines Anti-Money Laundering laws**.**
ARBITRAGE:
Getting risk-free profits by trading (simultaneous buying and selling of the cryptocurrency) on two different exchanges which have different prices for the same asset.
Ashdraked:
Being Ashdraked is essentially a more detailed version of being Zhoutonged. It is when you lose all of your invested capital, but you do so specifically by shorting Bitcoin. The expression “Ashdraked” comes from a story of a Romanian cryptocurrency investor who insisted upon shorting BTC, as he had done so successfully in the past. When the price of BTC rose from USD 300 to USD 500, the Romanian investor lost all of his money.
ATH (All Time High):
The highest price ever achieved by a cryptocurrency in its entire history. Alternatively, ATL is all time low
Bearish:
A tendency of prices to fall; a pessimistic expectation that the value of a coin is going to drop.
Bear trap:
A manipulation of a stock or commodity by investors.
Bitcoin:
The very first, and the highest ever valued, mass-market open source and decentralized cryptocurrency and digital payment system that runs on a worldwide peer to peer network. It operates independently of any centralized authorities
Bitconnect:
One of the biggest scams in the crypto world. it was made popular in the meme world by screaming idiot Carlos Matos, who infamously proclaimed," hey hey heeeey” and “what's a what's a what's up wasssssssssuuuuuuuuuuuuup, BitConneeeeeeeeeeeeeeeeeeeeeeeect!”. He is now in the mentally ill meme hall of fame.
Block:
A package of permanently recorded data about transactions occurring every time period (typically about 10 minutes) on the blockchain network. Once a record has been completed and verified, it goes into a blockchain and gives way to the next block. Each block also contains a complex mathematical puzzle with a unique answer, without which new blocks can’t be added to the chain.
Blockchain:
An unchangeable digital record of all transactions ever made in a particular cryptocurrency and shared across thousands of computers worldwide. It has no central authority governing it. Records, or blocks, are chained to each other using a cryptographic signature. They are stored publicly and chronologically, from the genesis block to the latest block, hence the term blockchain. Anyone can have access to the database and yet it remains incredibly difficult to hack.
Bullish:
A tendency of prices to rise; an optimistic expectation that a specific cryptocurrency will do well and its value is going to increase.
BTFD:
Buy the fucking dip. This advise was bestowed upon us by the gods themselves. It is the iron code to crypto enthusiasts.
Bull market:
A market that Cryptos are going up.
Consensus:
An agreement among blockchain participants on the validity of data. Consensus is reached when the majority of nodes on the network verify that the transaction is 100% valid.
Crypto bubble:
The instability of cryptocurrencies in terms of price value
Cryptocurrency:
A type of digital currency, secured by strong computer code (cryptography), that operates independently of any middlemen or central authoritie
Cryptography:
The art of converting sensitive data into a format unreadable for unauthorized users, which when decoded would result in a meaningful statement.
Cryptojacking:
The use of someone else’s device and profiting from its computational power to mine cryptocurrency without their knowledge and consent.
Crypto-Valhalla:
When HODLers(holders) eventually cash out they go to a place called crypto-Valhalla. The strong will be separated from the weak and the strong will then be given lambos.
DAO:
Decentralized Autonomous Organizations. It defines A blockchain technology inspired organization or corporation that exists and operates without human intervention.
Dapp (decentralized application):
An open-source application that runs and stores its data on a blockchain network (instead of a central server) to prevent a single failure point. This software is not controlled by the single body – information comes from people providing other people with data or computing power.
Decentralized:
A system with no fundamental control authority that governs the network. Instead, it is jointly managed by all users to the system.
Desktop wallet:
A wallet that stores the private keys on your computer, which allow the spending and management of your bitcoins.
DILDO:
Long red or green candles. This is a crypto signal that tells you that it is not favorable to trade at the moment. Found on candlestick charts.
Digital Signature:
An encrypted digital code attached to an electronic document to prove that the sender is who they say they are and confirm that a transaction is valid and should be accepted by the network.
Double Spending:
An attack on the blockchain where a malicious user manipulates the network by sending digital money to two different recipients at exactly the same time.
DYOR:
Means do your own research.
Encryption:
Converting data into code to protect it from unauthorized access, so that only the intended recipient(s) can decode it.
Eskrow:
the practice of having a third party act as an intermediary in a transaction. This third party holds the funds on and sends them off when the transaction is completed.
Ethereum:
Ethereum is an open source, public, blockchain-based platform that runs smart contracts and allows you to build dapps on it. Ethereum is fueled by the cryptocurrency Ether.
Exchange:
A platform (centralized or decentralized) for exchanging (trading) different forms of cryptocurrencies. These exchanges allow you to exchange cryptos for local currency. Some popular exchanges are Coinbase, Bittrex, Kraken and more.
Faucet:
A website which gives away free cryptocurrencies.
Fiat money:
Fiat currency is legal tender whose value is backed by the government that issued it, such as the US dollar or UK pound.
Fork:
A split in the blockchain, resulting in two separate branches, an original and a new alternate version of the cryptocurrency. As a single blockchain forks into two, they will both run simultaneously on different parts of the network. For example, Bitcoin Cash is a Bitcoin fork.
FOMO:
Fear of missing out.
Frictionless:
A system is frictionless when there are zero transaction costs or trading retraints.
FUD:
Fear, Uncertainty and Doubt regarding the crypto market.
Gas:
A fee paid to run transactions, dapps and smart contracts on Ethereum.
Halving:
A 50% decrease in block reward after the mining of a pre-specified number of blocks. Every 4 years, the “reward” for successfully mining a block of bitcoin is reduced by half. This is referred to as “Halving”.
Hardware wallet:
Physical wallet devices that can securely store cryptocurrency maximally. Some examples are Ledger Nano S**,** Digital Bitbox and more**.**
Hash:
The process that takes input data of varying sizes, performs an operation on it and converts it into a fixed size output. It cannot be reversed.
Hashing:
The process by which you mine bitcoin or similar cryptocurrency, by trying to solve the mathematical problem within it, using cryptographic hash functions.
HODL:
A Bitcoin enthusiast once accidentally misspelled the word HOLD and it is now part of the bitcoin legend. It can also mean hold on for dear life.
ICO (Initial Coin Offering):
A blockchain-based fundraising mechanism, or a public crowd sale of a new digital coin, used to raise capital from supporters for an early stage crypto venture. Beware of these as there have been quite a few scams in the past.
John mcAfee:
A man who will one day eat his balls on live television for falsely predicting bitcoin going to 100k. He has also become a small meme within the crypto community for his outlandish claims.
JOMO:
Joy of missing out. For those who are so depressed about missing out their sadness becomes joy.
KYC:
Know your customer(alternatively consumer).
Lambo:
This stands for Lamborghini. A small meme within the investing community where the moment someone gets rich they spend their earnings on a lambo. One day we will all have lambos in crypto-valhalla.
Ledger:
Away from Blockchain, it is a book of financial transactions and balances. In the world of crypto, the blockchain functions as a ledger. A digital currency’s ledger records all transactions which took place on a certain block chain network.
Leverage:
Trading with borrowed capital (margin) in order to increase the potential return of an investment.
Liquidity:
The availability of an asset to be bought and sold easily, without affecting its market price.
of the coins.
Margin trading:
The trading of assets or securities bought with borrowed money.
Market cap/MCAP:
A short-term for Market Capitalization. Market Capitalization refers to the market value of a particular cryptocurrency. It is computed by multiplying the Price of an individual unit of coins by the total circulating supply.
Miner:
A computer participating in any cryptocurrency network performing proof of work. This is usually done to receive block rewards.
Mining:
The act of solving a complex math equation to validate a blockchain transaction using computer processing power and specialized hardware.
Mining contract:
A method of investing in bitcoin mining hardware, allowing anyone to rent out a pre-specified amount of hashing power, for an agreed amount of time. The mining service takes care of hardware maintenance, hosting and electricity costs, making it simpler for investors.
Mining rig:
A computer specially designed for mining cryptocurrencies.
Mooning:
A situation the price of a coin rapidly increases in value. Can also be used as: “I hope bitcoin goes to the moon”
Node:
Any computing device that connects to the blockchain network.
Open source:
The practice of sharing the source code for a piece of computer software, allowing it to be distributed and altered by anyone.
OTC:
Over the counter. Trading is done directly between parties.
P2P (Peer to Peer):
A type of network connection where participants interact directly with each other rather than through a centralized third party. The system allows the exchange of resources from A to B, without having to go through a separate server.
Paper wallet:
A form of “cold storage” where the private keys are printed onto a piece of paper and stored offline. Considered as one of the safest crypto wallets, the truth is that it majors in sweeping coins from your wallets.
Pre mining:
The mining of a cryptocurrency by its developers before it is released to the public.
Proof of stake (POS):
A consensus distribution algorithm which essentially rewards you based upon the amount of the coin that you own. In other words, more investment in the coin will leads to more gain when you mine with this protocol In Proof of Stake, the resource held by the “miner” is their stake in the currency.
PROOF OF WORK (POW) :
The competition of computers competing to solve a tough crypto math problem. The first computer that does this is allowed to create new blocks and record information.” The miner is then usually rewarded via transaction fees.
Protocol:
A standardized set of rules for formatting and processing data.
Public key / private key:
A cryptographic code that allows a user to receive cryptocurrencies into an account. The public key is made available to everyone via a publicly accessible directory, and the private key remains confidential to its respective owner. Because the key pair is mathematically related, whatever is encrypted with a public key may only be decrypted by its corresponding private key.
Pump and dump:
Massive buying and selling activity of cryptocurrencies (sometimes organized and to one’s benefit) which essentially result in a phenomenon where the significant surge in the value of coin followed by a huge crash take place in a short time frame.
Recovery phrase:
A set of phrases you are given whereby you can regain or access your wallet should you lose the private key to your wallets — paper, mobile, desktop, and hardware wallet. These phrases are some random 12–24 words. A recovery Phrase can also be called as Recovery seed, Seed Key, Recovery Key, or Seed Phrase.
REKT:
Referring to the word “wrecked”. It defines a situation whereby an investor or trader who has been ruined utterly following the massive losses suffered in crypto industry.
Ripple:
An alternative payment network to Bitcoin based on similar cryptography. The ripple network uses XRP as currency and is capable of sending any asset type.
ROI:
Return on investment.
Safu:
A crypto term for safe popularized by the Bizonnaci YouTube channel after the CEO of Binance tweeted
“Funds are safe."
“the exchage I use got hacked!”“Oh no, are your funds safu?”
“My coins better be safu!”


Sats/Satoshi:
The smallest fraction of a bitcoin is called a “satoshi” or “sat”. It represents one hundred-millionth of a bitcoin and is named after Satoshi Nakamoto.
Satoshi Nakamoto:
This was the pseudonym for the mysterious creator of Bitcoin.
Scalability:
The ability of a cryptocurrency to contain the massive use of its Blockchain.
Sharding:
A scaling solution for the Blockchain. It is generally a method that allows nodes to have partial copies of the complete blockchain in order to increase overall network performance and consensus speeds.
Shitcoin:
Coin with little potential or future prospects.
Shill:
Spreading buzz by heavily promoting a particular coin in the community to create awareness.
Short position:
Selling of a specific cryptocurrency with an expectation that it will drop in value.
Silk road:
The online marketplace where drugs and other illicit items were traded for Bitcoin. This marketplace is using accessed through “TOR”, and VPNs. In October 2013, a Silk Road was shut down in by the FBI.
Smart Contract:
Certain computational benchmarks or barriers that have to be met in turn for money or data to be deposited or even be used to verify things such as land rights.
Software Wallet:
A crypto wallet that exists purely as software files on a computer. Usually, software wallets can be generated for free from a variety of sources.
Solidity:
A contract-oriented coding language for implementing smart contracts on Ethereum. Its syntax is similar to that of JavaScript.
Stable coin:
A cryptocoin with an extremely low volatility that can be used to trade against the overall market.
Staking:
Staking is the process of actively participating in transaction validation (similar to mining) on a proof-of-stake (PoS) blockchain. On these blockchains, anyone with a minimum-required balance of a specific cryptocurrency can validate transactions and earn Staking rewards.
Surge:
When a crypto currency appreciates or goes up in price.
Tank:
The opposite of mooning. When a coin tanks it can also be described as crashing.
Tendies
For traders , the chief prize is “tendies” (chicken tenders, the treat an overgrown man-child receives for being a “Good Boy”) .
Token:
A unit of value that represents a digital asset built on a blockchain system. A token is usually considered as a “coin” of a cryptocurrency, but it really has a wider functionality.
TOR: “The Onion Router” is a free web browser designed to protect users’ anonymity and resist censorship. Tor is usually used surfing the web anonymously and access sites on the “Darkweb”.
Transaction fee:
An amount of money users are charged from their transaction when sending cryptocurrencies.
Volatility:
A measure of fluctuations in the price of a financial instrument over time. High volatility in bitcoin is seen as risky since its shifting value discourages people from spending or accepting it.
Wallet:
A file that stores all your private keys and communicates with the blockchain to perform transactions. It allows you to send and receive bitcoins securely as well as view your balance and transaction history.
Whale:
An investor that holds a tremendous amount of cryptocurrency. Their extraordinary large holdings allow them to control prices and manipulate the market.
Whitepaper:

A comprehensive report or guide made to understand an issue or help decision making. It is also seen as a technical write up that most cryptocurrencies provide to take a deep look into the structure and plan of the cryptocurrency/Blockchain project. Satoshi Nakamoto was the first to release a whitepaper on Bitcoin, titled “Bitcoin: A Peer-to-Peer Electronic Cash System” in late 2008.
And with that I finally complete my odyssey. I sincerely hope that this helped you and if you are new, I welcome you to crypto. If you read all of that I hope it increased, you in knowledge.
my final definition:
Crypto-Family:
A collection of all the HODLers and crypto fanatics. A place where all people alike unite over a love for crypto.
We are all in this together as we pioneer the new world that is crypto currency. I wish you a great day and Happy HODLing.
-u/flacciduck
feel free to comment words or terms that you feel should be included or about any errors I made.
Edit1:some fixes were made and added words.
submitted by flacciduck to CryptoCurrency [link] [comments]

A guide to Popcorn Time [For beginners]

A guide to Popcorn Time [For beginners]

Popcorn Time takes its inspiration from Netflix, boasting a clean outlook with thumbnails and categories - And streams pirated copies of movies and shows to your computer or smartphone


Editors note: There are many fake versions of Popcorn Time. This article primarily use Reddit as its source to recommend and link to the official, well regarded, version of the app.
When you think of movie streaming, services like Hulu, Disney+, and Netflix usually come to mind. However, there is another streaming platform that is particularly popular for streaming pirated movies: Popcorn Time. This streaming platform allows you to watch torrented and pirated movies without paying anything. All you need to do is install it on your PC/smartphone/tablet, search for a film, and click play. However, there are piracy and safety concerns when it comes to using Popcorn Time. This is how it works.

Index

  • What Exactly is Popcorn Time?
  • How it Works
  • How to Install Popcorn Time
  • Which version is legit?
  • Where does popcorn time store movies?
  • Popcorn Time APK for Android
  • Is Popcorn Time available on iOS?
  • Is it Illegal to Use Popcorn Time?
  • How does the developers make money?
  • Popcorn Time alternatives
  • Summary

What Exactly is Popcorn Time?

Popcorn Time is an open-source, multi-platform BitTorrent software application with a stylish and attractive media player. It was initially released in March 2014 by a team of developers in Argentina. They wanted to create a software that allows users to stream video content from torrent. Popcorn Time takes its inspiration from Netflix, boasting a clean outlook with thumbnails and categories. It uses sequential downloading and uploading to play movies, hence allowing you to stream pirated movies instantly.

Popcorn Time on the Mac

How it Works

Popcorn Time is a torrent based streaming tool and the way it works is simple enough. Let’s say you want to watch Tenet (it's not out as of this writing). You use the interface provided by the platform to find and click that title, and the tool then navigates through existing BitTorrent titles automatically from come from two well known torrent sites. YTS for movies and eztv for tv-shows. Then, Tenet is streamed directly to your computer from that pre-existing BitTorrent source. So, while you watch the film, Popcorn Times acts as a torrent client and continues to leech and seed it from other people. That means you'll be forced to share the content you watch.

How to Install Popcorn Time?

In order to use Popcorn Time to stream pirated movies, you will need to download and install the software on your computer or smartphone. The app is available for variety of operating systems, including Android, Linux, Windows, Mac, etc.
  • Download Popcorn Time from popcorntime.app which hosts Mac, Windows and Android.
  • There are no specific installation requirements as it is installed just like any other app.
However, keep in mind that its usage has been banned in many regions. So, you cannot download it from Apple’s Apple Store or Google Play Store. In some countries popcorntime.app has been blocked and you need a VPN to hide your real IP. You might want to use VPN software to keep your own information private and anonymous when running the app as well.

Which version is legit, and real?

There are many clones out there, some of which will install other apps, using your computer as a bitcoin miner.
The legit, and most supported version according to Reddit, is popcorntime.app (formerly known as popcorntime.sh)

Where does popcorn time store movies?

On your computer or device. Using torrents the app stream the files, while they are being downloaded. So it's just like when you download a torrent, except it starts the video during the download.

Popcorn Time APK for Android

One of the most popular usage of Popcorn Time is its Android version, and the recently relaunched Android TV version. The most popular and liked version comes from popcorntime.app which is also the officially supported version on Reddit.

Is Popcorn Time available on iOS?

Yes. But it's not as easy as downloading an app from the App store.The iPhone version of Popcorn Time is unstable and requires a jailbroken iPhone. Since jailbreaking your iPhone in 2020 is difficult and time consuming, it isn't an option for most. If you still want to try, there is Antique's version. You can follow his updates and links on Twitter. There is also a version which allegedly works with the alternative, non-jailbreak required, but much debated, altstore. For more information, see its Github home.

Is it Illegal to Use Popcorn Time?

In most cases, yes.
Most, if not all, TV shows and movies which appear on Popcorn Time are pirated, and you may be wondering about the legality of it all. First of all, downloading any copyrighted file is illegal in most countries. However, torrents themselves are a valid means to share and download files. So without sounding too confusing, it is typically not illegal to download Popcorn Time. It's when you stream or download the movies and tv-shows themselves it gets risky. But depending on where you live this might not be the case. Copyright infringement is illegal in Germany while in India, there are no restrictions of using Popcorn Time to steam movies as long as you don’t redistribute them. Of course, laws change. That’s why it is recommended that you do your research to understand the risks.

How does the developers make money?

The Popcorn time version we recommend has affiliate links to VPN services. How much money this actually is, or if its funding hardware costs, is unknown. But it proves that money is being generated from the app.

Are there any alternatives?

There are a lot of alternatives, most of which are unstable or shady. However, here are a few alternatives recommended on Reddit. Note that they all come with their own positive and negatives aspects when compared to Popcorn Time.
  • Stremio - Open source project which lets you add your own sources, such as 1337 or Pirate Bay. It also uses official streams from YouTube, HBO and more. Has been reported as unstable but still the best Popcorn alternative.
  • Media Box HD - A MacOS app with 4K streams. Is known to be unstable for some.
  • Leonfix - A Popcorn Time Windows app which doesn't use torrents. Currently in beta.
  • ShowBox - Android alternative which doesn't use torrents. Unstable and currently in beta.
  • Radarr - Which automatically downloads shows and films.

Summary

Despite the concerns about whether or not using Popcorn Time is illegal, there is no denying that the tool is very impressive. The ability to download and stream torrent content in a seamless and hassle-free way is quite brilliant. Not to mention the platform has a much larger library of content with no restrictions whatsoever. So, it’s not surprising why many consider it a better alternative to regular torrents or a Disney+ subscription.

Feedback and corrections are more than welcome! Originally written for Where You Watch.
submitted by TheShynola to PopCornTime [link] [comments]

How to purchase and exchange your litecoin! (longer read)

This post will show you the best ways to buy litecoins using many different payment methods and exchanges for each method.
Before you start, make sure you have a good litecoin wallet to store your LTC. NEVER store your litecoins on a crypto exchange.

Popular Exchanges

eToro
Coinbase
Coinmama

Buy Litecoin with Credit Card or Debit Card

Let’s dive into some of the exchanges supporting Litecoin credit card purchases.
These exchanges are our favorite ways to buy.

Coinbase

Coinbase is the easiest way to buy litecoins with a credit card.
Coinbase is available in the United States, Canada, Europe, UK, Singapore, and Australia.
The fees will come out to 3.99% per purchase.
Here is a good video that can help walk you through the process of buying on Coinbase, although it’s fairly easy.

Coinmama

Coinmama recently added the ability to buy litecoin directly on the platform. Users from nearly any country in the world can use Coinmama to buy litecoins.
Coinmama has some of the highest limits among credit card exchanges.

BitPanda

BitPanda is based in Austria and is a crypto brokerage service. You can buy using a credit card from most European countries.

CEX.io

CEX.io is based in the UK and is one of the oldest crypto exchanges online.
CEX.io supports litecoin and its users from nearly anywhere in the world can buy litecoin with credit card on the platform.

Buy Litecoin with Bank Account or Bank Transfer

Coinbase

Coinbase is the easiest way to buy litecoins with a bank account or transfer.
Coinbase, like is is for credit cards, is available in the United States, Canada, Europe, UK, Singapore, and Australia.
Coinbase is one of primary exchanges used to buy Litecoins.
Americans can use ACH transfer (5–7 days wait), and Europeans can use SEPA transfer (1–3 days wait).
The fees will come out to 1.49% per purchase.

BitPanda

BitPanda is based in Austria and is a crypto brokerage service. You can buy using SEPA transfer from most European countries. You can also use SOFORT, NETELLER, or GiroPay.

CEX.io

CEX.io also supports litecoin buys via bank account. This is via wire transfer for US citizens, SEPA for Europe, and SWIFT for the rest of the globe.

Binance

Binance is now one of the largest if not the largest cryptocurrency exchange in the world. It supports bank and card purchases of Litecoin as well as Litecoin trading pairs with Bitcoin and Etehreum.

Get a Litecoin Wallet

Before we move onto other options:
Never store your litecoins on an exchange!
Always withdrawal your litecoin to an offline cryptocurrency wallet like the Ledger Nano S or any other wallet that you control.
The Ledger Nano S and TREZOR are the best options for secure storage.

Other Methods to Buy Litecoin

If you don’t have a card or want to avoid the high fees, you can use the following methods to buy Litecoin as well.
Find out which one works best for you.

Buy Litecoin with PayPal

Unfortunately, there is no easy way to buy Litecoin with PayPal. Other sites will tell you that cex allows for this, but that is no longer the case.
You can, however, now use eToro to buy Litecoin, unless you live in the United States.
If you live in the US, the only way to buy Litecoin with Paypal is to buy Bitcoin using paypal, and then use the Bitcoins to buy Litecoin. You can easily buy Bitcoin using Paypal on Local Bitcoins. Once you have Bitcoin, you can use an exchange like Coinbase Pro to swap the Bitcoin for Litecoin.

Buy Litecoin with Cash

There is no good way to buy litecoins with cash. LocalBitcoins is the most popular way to buy bitcoins with cash, and it does not have Litecoin support. Other popular cash to Bitcoin exchanges like BitQuick and Wall of Coins also do not support LTC. So you will have to first buy bitcoins with cash then exchange them for LTC using the method described below.
The same goes for Bitcoin ATMs. Most do not support Litecoin. So if you want to buy litecoins at a Bitcoin ATM you first have to buy bitcoins and then trade the BTC for litecoins.

Buy Litecoin with Bitcoin

If you already have Bitcoins then it is VERY simple to convert some of your BTC to litecoins.
You just need to find an exchange with the LTC/BTC pair, which is most exchanges since LTC/BTC is a very popular pair to trade.

Buy Litecoin with Skrill

BitPanda, mentioned above, also accepts Skrill payments for LTC. The fees will vary and are simply included in your buy price.

Cryptmixer

Cryptmixer is probably the fastest way to convert BTC to Litecoin. You just enter the amount of LTC you want to buy, and give them a LTC address. Then they will tell you how much BTC to send to their address. Once your BTC is sent, you will have LTC delivered to your wallet very shortly after.

Buy Litecoin with Ethereum

Ethereum has experienced a massive price rise. Nearly a year ago it was $10, and now at over $500, many want to move some of their ETH gains into other coins like Litecoin.
Litecoin has very good liquidity, and is very popular among traders especially in China.
So this guide is going to show you how to buy litecoins with Ethereum. We will show some of the best exchanges you can use, and the pros and cons of using different types of exchanges over the other.

Cryptmixer

Cryptmixer is one of the most unique exchanges, and also one of the fastest ways to convert your ETH to LTC.
With Cryptmixer you do not even need to store your money with the exchange, meaning you are at very little risk of getting your funds stolen.
With Cryptmixer you simply specify the amount of LTC you want to buy, and specific the address to where your litecoins should be sent and within 30 minutes you will have LTC delivered to your wallet.

Poloniex

Poloniex is the world’s largest altcoin exchange. However, there is a huge downside to using Poloniex to convert your ETH to LTC:
Poloniex does not have a LTC/ETH market, meaning you have to first trade your ETH to BTC, and then trade your BTC for LTC.
While this method works, you will have to make multiple trades and also pay fees twice.

ShapeShift

Shapeshift is basically the same as Cryptmixer, and was actually the first company to come up with the concept of an exchange that does not hold your own funds.

Frequently Asked Questions About Buying Litecoin

Many of you may still have lots of questions about how to buy Litecoin.
Odds are we have answered almost any question you could think of below.
We will aim to answer many of the most common questions relating to buying Litecoin.

Why are there limited options to buying Litecoin using other altcoins?

The issue in all crypto markets is liquidity. As the space gets bigger, the liquidity also gets better. But as of now, the only VERY liquid cryptocurrency is Bitcoin. So exchanging two altcoins between each other is often harder than if BTC was involved on one side of the trade.

How much is a Litecoin worth?

Like all currencies, the value of Litecoin changes every second. The value of Litecoin also depends on the country you are in and the exchange you are trading on. You can find the most up to date price on Coinbase.

How do I buy Ripple (XRP) with Litecoin?

The best way to buy Ripple using Litecoin is to either use a non KYC exchange like Cryptmixer or start an account on Binance or Coinbase Pro and sell your Litecoin for Ripple. Look for LTC/XRP trading pairs, and make your trade.

How long does Litecoin take to confirm?

Litecoin blocks are added ever 2 and a half minutes. That means you should get one confirmation every two and a half minutes. This can vary if it takes miners longer to discover a block, but the difficulty of the finding a block should change proportionate to the hashing power on the network so that a block gets added approximately every 2.5 minutes.
If you are trying to send money to a merchant, they may require more than one confirmation before they send you products. If you are depositing on an exchange, they may also require three or more confirmations before they credit your account.

How many Litoshis make one Litecoin?

one hundred million (100,000,000) Litoshis make one (1) Litecoin.

Where do I store Litecoin?

The best place to store litecoin is on a hardware wallet. You can find the best one for you on our page dedicated to hardware wallets.

When is the Litecoin halving?

The expected date of the next Litecoin block reward halving is August 7th, 2023.

Why can litecoin take so long to buy?

Litecoin can take long to buy because the legacy banking system is very slow. If you are buying with another cryptocurrency, you will see how fast it is to buy!
Bank transfer in the USA, for example, take about 5 days to complete. So any purchase of Litecoin made with a US bank transfer will take a minimum of 5 days.

How do I buy Litecoin with Paypal?

Unfortunately, there is no easy way to buy Litcoin with PayPal. Other sites will tell you that cex allows for this, but that is no longer the case.
You can, however, now use eToro to buy Litcoineum, unless you live in the United States.
If you live in the US, the only way to buy Litcoin with Paypal is to buy Bitcoin using paypal, and then use the Bitcoins to buy Litcoin. You can easily buy Bitcoin using Paypal on Local Bitcoins. Once you have Bitcoin, you can use an exchange like Cryptmixer to swap the Bitcoin for Litcoin.

Can you buy partial litecoins?

Yes, litecoin, like Bitcoin, is divisible to many decimal places so you can buy 0.1 LTC, 0.001 LTC, etc.

Can you sell litecoin?

Yes, you can sell LTC on most of the exchanges mentioned above. The fees, speed, and privacy is the same in most cases.

Can anyone buy litecoins?

Anyone is free to buy litecoins, as long as you find an exchange that supports your country. Most cryptocurrency wallets do not require ID to sign up so you can always make a wallet and get paid in litecoin, too.

Which payment method is best to use?

For speed, credit card will likely be fastest. For larger amounts, bank transfer is best. For privacy, it’s best to buy bitcoins with cash and then trade for litecoins using Cryptmixer or Shapeshift.

Is it better to mine or buy litecoins?

If you have cheap electricity, it might be worth it to mine litecoins. If you have solar power or just want to mine for fun then it could be worth it. Otherwise, it’s probably better just to buy.
Mining is constantly changing and small changes in Litecoin price or electricity can greatly affect your profitability.

What should I do with my litecoins once I buy?

You should immediately move your litecoins into a secure wallet. You should never leave your litecoins on an exchange. There have been countless hacks in cryptocurrency since Bitcoin was created in 2009. Hundreds of thousands of people have lost money. So buy your litecoins, and then instantly send them into a wallet you control so you are not at risk of losing money to a hack or scam.
submitted by MonishaNuij to MonMonCrypto [link] [comments]

About Venezuela crypto usage

Hi guys, I'm Venezuelan living here.
I have been posting updates about the crypto situation here in Venezuela.
Usually the main trade amount is by Localbitcoin, the traded weekly there is around 500 BTC. From Bs. (Bolivares) to BTC and from BTC to Bs.
Considering the current situation of the country, where minimum monthly wage is around 5 USD (800,000 Bs.) and the goverment regulated some prices and one kilo of meat is around 700,000 Bs. (almost one month of wage) .
I think 500 BTC per week is a respectable amount. The usage of origin of these amount of money is not clear to me, I think miners, people get paid in BTC, people that send remitances to their families in Venezuela and so on.
Traki is a store like Sears maybe, the have been accepting cryptos for like a year they use a POS made by Cryptobuyer and I really don't understand how it works (I think you simple have to wait for the confirmation at least 1).
https://imgur.com/a/YCKNBY1
They accept BTC, ETH, DASH, LTC, BINANCE and TETHER.
DASH has a great marketing team, they managed to KFC, Churchs Chicken, Papa Jhons and Subway to accept DASH in some locations.
https://www.forbes.com/sites/rebeccacampbell1/2018/12/07/discussions-in-place-for-dash-to-be-accepted-at-kfc-venezuela/#5e6269bc5d38
https://dashnews.org/churchs-chicken-venezuela-offers-special-promotion-for-paying-with-dash/
https://www.businessinsider.com/dash-cryptocurrency-surges-in-venezuela-as-hyperinflation-explodes-2018-8 (A billboard in one of the main highways in Caracas) https://www.businessinsider.nl/dash-cryptocurrency-surges-in-venezuela-as-hyperinflation-explodes-2018-8/?international=true&r=UK
There are some stores that sell mining hardware (I think they have some relation with the goverment, because mining here is dangerous the police dont like you to mine and if they found out you are easily a ramson victim), this is a news of that store now accepting BTC cash (by the way the only accept crypto payments)
https://es.0xzx.com/201906039799.html
https://alnavio.com/noticia/16806/economa/en-venezuela-la-criptomoneda-dash-se-admite-en-movistar-subway-y-otros-2.500-comercios.html (in spanish)
About the PETRO:
https://www.reddit.com/CryptoCurrency/comments/gbpqvb/petro_the_venezuelan_goverment_backed_crypto_is/
About the WAGE and prices:
https://translate.google.com/translate?um=1&ie=UTF-8&hl=es&client=tw-ob&sl=es&tl=en&u=https%3A%2F%2Fefectococuyo.com%2Feconomia%2Fgobierno-de-maduro-actualizo-precios-de-27-productos-regulados%2F
About LocalBITCOIN Volumes:
https://coin.dance/volume/localbitcoins/VES

Any question AMA.
submitted by WorkingLime to CryptoCurrency [link] [comments]

Test results TkeyNet, release date, and the opening of an office in the UK.

Test results TkeyNet, release date, and the opening of an office in the UK.

https://preview.redd.it/o29r0qu664j51.png?width=700&format=png&auto=webp&s=b34a6841ca97bbd70c9a23fe5ed83813d5f513d1
Hello everyone! Today we will talk about the results of the development of the TkeyNet system and related products, as well as share the test results and release date.
To date, the Protocol has fully debugged. The process of debugging the TkeyNet system is moving with decisive steps — 94.7% of testing of all the functions that TkeyNet includes has completed.
During the tests, the following properties and functions tested with different scenarios:
  • Atomic exchanges;
  • Security;
  • Validation;
  • Interaction of the Protocol with SQLite and PostgreSQL databases;
  • Consensus;
  • Modules for financial institutions;
  • Data exchange in the network;
  • Synchronization;
  • The monitoring system of balance;
  • Transactions that include trades;
  • API;
  • TkeyIndex;
  • TkeyConnect.
Documentation for the TkeyNet system will release on the website tkey.org as well as reviews of the system TkeyNet will be published in the company’s blog.
Back-end TkeyNet developed in the C++ and C) programming languages, to improve performance, some of the code written in C.
The C programming language is the world’s fastest high-level programming language. It is called a high-level assembler, but unlike an assembler, code on it can be compile without changes on any device.
The specified stack is selected to meet the stringent requirements of the financial sector: enhanced security, scalability, and the ability of the system to work 24/7/365. The TkeyNet system is adapted to the world standards: ISO, ISIN.

https://preview.redd.it/x9g2rlz864j51.png?width=700&format=png&auto=webp&s=b2cf80ee5cd722abdb306803d6454e2afde899b0
TkeyNet supports the structured query language and interacts with flexible SQLite and PostgreSQL databases.
PostgreSQL complies with ANSI/ISO SQL standards, and unlike other DBMSs, it has object-oriented functionality, including full support for the ACID concept. An SQLite was selected to improve the speed and performance of operations. SQLite will also serve as an excellent solution for mobile applications that will be created based on TkeyNet.
PostgreSQL is the most advanced RDBMS, focusing primarily on full compliance with standards and extensibility.
During this period, we also completed work on a powerful API. The API is designed for organizations and developers to use the full power of TkeyNet in individual solutions. Software developers, whether mobile apps or local software, will get APIs and client libraries that will simplify the interaction of the corporate market with TkeyNet.
The API provides guaranteed availability, scalable volumes, and responds within milliseconds.

Test results: transaction and operation speed in TkeyNet

To date, testing shows excellent results on the speed of payments made via TkeyNet.
Last week’s results: unlike the first Protocol, where it took at least 10 minutes to validate a transaction, payment transactions in TkeyNet processed in 25 seconds without losing security properties. Performance improved by 2400% compared to Core 1.0

The block generation time in Core 1.0 is at least 10 minutes, and in TkeyNet — 25 seconds according to the test results.
If it took at least 10 minutes to confirm a block, and sometimes it took two or more hours, in TkeyNet developers achieved a stable indicator of 25 seconds without losing security properties.
To achieve our goal of launching the Protocol — we identify possible changes, theorize solutions, model proposals, and test our theories in practice. This process involves a lot of internal discussions and collaboration with external parties who provide feedback on the operation of a particular module, and the entire system as a whole.
Before the launch of TkeyNet, work will carry out to optimize and improve performance. The team plans to increase its performance indicators by 6000% compared to Core 1.0.

The Core 1.0 block generation time is 10 minutes. TkeyNet test network — 25 seconds. TkeyNet main network-up to 10 seconds.
To do this, we will work with individual modules and libraries of databases, transactions, and consensus. The goal for developers is to process payment transactions for up to 10 seconds at most.
The process secure in the logic of consensus, which solves a complex problem in a matter of seconds.

High throughput rates of the TkeyNet Protocol. B2B & B2C sectors.

To meet the needs of companies, startups, and corporations, — TkeyNet responds with fast processing of trades*.
Payment transactions — exchange of currency or shares, exchange operations, interbank settlements, etc.
For a better understanding, let’s analyze the obtained characteristics at the time of testing TkeyNet:

https://preview.redd.it/t31c3kih64j51.png?width=466&format=png&auto=webp&s=daad005d8cd5066e9d3cb67e9f147d0a7b362d97
Results: 1,225,000 trades per block.
https://preview.redd.it/gerxtesi64j51.png?width=472&format=png&auto=webp&s=e0b96995b7d6fbede61fe7761a55005ec20de403

The scaling of the TkeyNet system

The TkeyNet system is easily scalable by increasing the RAM and CPU parameters. We have launched three nodes on powerful servers with the following characteristics:
  • CPU: 72 Core.
  • RAM: 144 Gb.
  • SSD: 120 Gb.
Transaction throughput increased 2.8 times to ≈3,430,000 transactions per block.

https://preview.redd.it/mvot6c3l64j51.png?width=617&format=png&auto=webp&s=23f4ea57f30fd6978568d12948c0ecb571f2f071

Vertical scaling

Unlike Bitcoin and other blockchain systems, where increasing the power of the miner’s hardware does not lead to an increase in network bandwidth.
Usually in such networks, increasing the power is a direct necessity, otherwise, transactions will not take place at all or will take hours, or even days. Because of what actually appears “manipulation of miners” and various types of network attacks.
On practice in such networks, increasing power is a direct necessity otherwise, transactions will not take place at all or will take hours or even days. Therefore of what appears “manipulation of miners” and various types of network attacks.
TkeyNet uses vertical scaling. With increasing node capacity, the throughput of the entire TkeyNet system increases. It turns out that regardless of the number and power of nodes, transactions will take place in 25 seconds, and with increasing power nodes — the number of processed transactions will grow.
As we said above, our developers are working to improve these indicators, where the block validation time will take no more than 10 seconds. Transactions will take place for 1 second to 10 seconds maximum. Also, this parameter significantly increases the volume of trades conducted via TkeyNet.

Front-end. Graphical user interface.


https://preview.redd.it/wrjfa95n64j51.png?width=700&format=png&auto=webp&s=a5137fac7774864fab431fdd7ac51c73ffca3075
During August, the web products team continues working on secure wallets and a blockchain Explorer. The new software is under development, but it has already come a long way from layouts and graphic design and is ready to move to the stage of connecting the TkeyNet back-end with native products. If everything is in the final stage on the back-end side, then the client part (front-end*) needs time to complete debugging. We needed to design applications per best security practices.
\The Front-end developer creates the user interface.* Testing of blockchain applications is not much different from testing regular applications and resembles functional testing of a payment system. Test cases include checking the balance, fields, transaction statuses, and so on.
Also, we conduct continuous testing during development, taking into account the severity and scale of the TkeyNet system that will be used by organizations, corporations, and users, respectively. According to the results of testing and a meeting of the development team, the launch of TkeyNet is agreed for September 25–mid-October, possibly earlier.
Website tkey.org — will be updated in October 2020, taking into account the volume of documentation, packaging all the meanings of the perfect new product TkeyNet. Tkeycoin.com — updated earlier, before launching TkeyNet.
Also, to the upcoming launch of TkeyNet, the management decided to open a representative office of TKEY in the UK for the development of digital Banking and digitalization of assets.
Working with partners in the UK will focus on implementing TKEY’s corporate strategy and market solutions that meet customer needs, create new revenue sources, and provide opportunities for Corporations growth.
We create a great future for people by continuously improving our services and business products. All our actions are concentrate on becoming a leader in the market.
We also remind you that after the launch of TkeyNet, the start date of TKey trading will announce.
The fourth quarter will be hot, get ready!
https://i.redd.it/ynv5xknq64j51.gif
submitted by tkeycoin to Tkeycoin_Official [link] [comments]

AT2: Asynchronous Trustworthy Transfers

AT2, a fairly new unknown tech to create a decentralized asset transfer system without blockchain.
This week there was an article @ www.computing.co.uk. See below.
link: https://www.computing.co.uk/feature/4017118/at2-answer-cryptocurrency-energy-performance
AT2 paper: https://arxiv.org/pdf/1812.10844.pdf

Could AT2 be the answer to cryptocurrency's energy and performance problems?
Blockchains are slow, wasteful and ill-suited for digital currencies, say researchers who believe they've found a better way
Blockchains solve a hard problem: how to ensure consensus across a distributed, decentralised network, where messages arrive out of order if at all, where individual nodes may fail, and where a certain proportion may be actively malicious.
The original blockchain, bitcoin, was designed to support a novel digital currency, and the issue its consensus algorithm solved was preventing double-spend. It also successfully introduced game theory for security: adversaries would have to spend more money on an attack than they could expect to gain financially. All this and the original protocol was just a few hundred lines of code.
But this achievement came at a high cost in terms of energy use and performance.
With bitcoin, a new leader is required to verify each block of transactions, that leader being the first device to complete a computationally heavy challenge (Proof of Work, PoW). As a result, the blockchain's throughput is painfully slow at around seven transactions per second (Visa claims it can do 56,000) and the whole process is massively wasteful of energy. These drawbacks have been surmounted, to some degree, in newer blockchain designs using overlay networks, sharding and different types of "proofs of" and by non-blockchain directed acyclic graphs (DAGs), but each requires tradeoffs in terms of centralisation, complexity or security.
A group of researchers led by computer scientist Professor Rachid Guerraoui of Swiss University Ecole Polytechnique Fédérale de Lausanne (EPFL) decided to look afresh at the problem. Is this gargantuan security apparatus, in which every node in a network of thousands or millions must come to a consensus about the ordering of events, really necessary everytime someone makes a purchase? Could a leaderless mechanism be applied to the problem instead? If so, could it be guaranteed to be reliably consistent, even when a certain number of nodes are malicious or faulty (Byzantine)?
The headline answer, published in an initial paper last year, is that network-wide consensus is overkill for simple asset transfers. If cryptocurrencies could be rebooted, all the fossil fuels burned by miners of bitcoin and its clones could be left in the ground and Visa-level transaction speeds could be achieved without any loss of security or reliance on centralised control. As compact as Satoshi's original bitcoin protocol itself, the few hundred lines of code that make up their Asynchronous Trusted Transfers (AT2) algorithm could solve some of the tricky problems that have plagued decentralised token-based networks from the off.
AT2 can be used to validate transactions within two different decentralised networking scenarios: (1) permissioned or small unpermissioned networks, and (2) global scale unpermissioned networks. In the first case, the algorithm uses quorum for validating actions, whereby a certain proportion of the network's nodes must agree an action is correct before it can take place. The second scenario, networks made up of very large number of machines (nodes), uses probabilistic sampling. Instead of asking all nodes it checks a number of randomly selected nodes for their viewpoint. This is much more efficient and scalable than the deterministic quorum but carries a tiny (ca. 10-15) possibility of failure.
Doing away with network-wide consensus means AT2 sidesteps the bane of decentralised networks, the FLP Impossibility - the theory that in a fully asynchronous system, a deterministic consensus algorithm cannot be safe, live and fault-tolerant.
Computing caught up with Matteo Monti, who worked on the statistical aspects of AT2, and by email with Guerraoui to find out more. We also spoke to David Irvine of networking firm MaidSafe, which has adopted AT2 to simplify its consensus process.

Incentivising improvements
We asked Monti (pictured) to summarise the innovation that AT2 brings to the table.
"What we noticed is that there's a specific subclass of problems that can be solved on a decentralised, distributed network without requiring consensus," he said. "The main use for consensus at the moment, cryptocurrency transactions, is part of that class. We can solve this using a weaker abstraction and in doing so you gain the ability to work in a completely asynchronous environment."
Bitcoin doesn't even solve consensus well. It solves eventual consensus which an even weaker abstraction, he added, whereas AT2 can guarantee strong eventual consistency. Another issue it tackles is PoW's incentivization model which means that improvements in technology do not translate into a better performing network.
"With bitcoin, the bottleneck is always electricity. If everyone doubles their computational speed it's not going to change the efficiency of the network. Everyone's competing not to compute but to waste energy."
In place of PoW, AT2 uses ‘Proof of Bandwidth', i.e. evidence of recent interaction, to verify that a node is real. Since it doesn't rely on consensus, the performance of AT2 should allow messaging speeds across the network that approach the theoretical maximum, and improvements in hardware will translate into better overall performance.

Security measures
Blockchains like bitcoin are extremely resilient against Sybil attacks; bitcoin is still running after all, in the face of unwavering opposition from powerful nation states and bankers. Sybil attacks are a major vulnerability in permissionless decentralised networks where anyone can join anonymously, but there are others too.
Monti said the most challenging aspect of designing the AT2 algorithm was distilling all the potential types of dangerous Byzantine behaviour into a manageable set so they could be treated using probability theory. As a result of studying many possible failure scenarios, including Sybil, the algorithm is able to quickly react to deviations from the norm.
Other security features flow from the fact that each network node needs to know only a limited amount about its counterparts for the system to function. For example, the randomness used in sampling operations is generated locally on the calling device rather than on the network, making this vector hard to utilise by an attacker looking to influence events.
Signals are passed across the network via a messaging system called Byzantine Reliable Broadcasting (BRB) a gossip-based method by which nodes can quickly and reliably come to an agreement about a message even if some are Byzantine.
As a result of these features, AT2 does not rely on economic game theory for security, said Monti.
"I'd go as far as saying that the moment you need to implement an economic disadvantage to attacking the system, it means that you failed to make it impossible to attack the system. We don't care about your interests in attacking the system. What we want to achieve is a proof that no matter what you do, the system will not be compromised."

‘Crypto-Twitter'
AT2 starts with the simple idea that rather than requiring the whole network to maintain a time-ordered record of my transactions (as with a blockchain or DAG), the only person who needs to keep that tally is me.
If I decide to spend some money, I merely announce that fact to the network over BRB and this request will be held in a memory snapshot escrow. Depending on the network type, a representative sample or a quorum of other nodes then check my balance and inspect my ordered transaction history to ensure that the funds haven't already been spent (each transaction has a unique sequential ID) and provided all is correct the transaction is guaranteed to go through, even if up to a third of those validators are malicious. If I try to cheat, the transaction will be blocked.
Monti likens a wallet on an AT2 network to a social media timeline.
"What we've proved, essentially, is that you can have a cryptocurrency on Twitter," he explained.
"A payment works in two steps. First, there's a withdrawal from my account via a tweet, then the second step is a deposit, or a retweet. I tweet a message saying I want to pay Bob. Bob then retweets this message on his own timeline, and in the act of retweeting he's depositing money in his account.
"So everyone has their own independent timeline and while the messages - my tweets - are strictly ordered, that's only in my own timeline; I don't care about ordering relative to other timelines. If I try to pay someone else, it will be obvious by the sequence of tweets in my account, and my account only, whether I can perform that payment.
"In contrast, consensus effectively squeezes all of the messages into a unique timeline on which everybody agrees. But this is overkill, you don't need it. We can prove that it still works even if the ordering is partial and not total, and this enables us to switch from consensus to reliable broadcast."
But of course, nothing comes for free. AT2 can verify exchanges of tokenised assets, but aside from arrangements between a small number of opted-in parties, it does not have the ability to support smart contracts of the type that are viable on ethereum and other blockchains, because this does require network-wide consensus. Guerraoui said his team is working on "refinements and extensions" to support such functionality in the future.

Early adopters
AT2 is still pretty ‘cutting edge'. Three papers have been accepted for peer review the latest published in February, but it provides the sort of efficiencies and simplifications that could bring real progress. Guerraoui said AT2 has "received interest from many groups including companies ‘selling' blockchain approaches, as well as companies and organisations using such approaches".
One organisation that has already picked up on the potential of AT2 is Scotland's MaidSafe, creator of the SAFE Network. MaidSafe is already using AT2 to replace its Parsec consensus algorithm, which testing showed was indeed overkill for many network operations. CEO David Irvine said he and his colleagues came across AT2 while working on another way of propagating changes to data without consensus, conflict-free data replicated types (CRDTs), promptly forked the code and started to apply it.
SAFE, currently in Alpha, is a sharded network, meaning it's subdivided into small semi-autonomous sections. On a network level, the way it works is that trusted 'elder' nodes vote on a requested action then pass instructions to other sections to carry it out.
AT2 allows the initial task of accumulating the votes for an action, which had been done by the elders using a consensus algorithm, to be moved off the network and onto the requesting client which is much more lightweight and efficient. Once a quorum of votes has been gathered, the client simply resubmits the request and the elders will ensure it's carried out. The system is much simpler and should be more secure too. "It's 200 lines of logic compared to 15,000 for a start," Irvine said.
AT2 is not just used to validate token transfers. By the same mechanism, it can also be used to authorise requests to store or change data. Together with CRDTs, which guarantee that such changes cannot fail, this makes for a very tight and efficient ship, said Irvine.
"AT2 is for us a missing link. The difficulty of several nodes agreeing is simplified by the initiator taking on the effort of accumulating quorum votes. It seems so simple but in fact, it's an amazing innovation. It certainly falls into the category of 'why didn't I think of that?'."
submitted by ZaadNek to CryptoTechnology [link] [comments]

TradeOptionGains bitcoin site?

Got this weird DM on reddit idk what this guy is up to have any of you ever heard of this https://tradeoptiongains.com Site?
u/mikerobin25

Mikerobin2501:52 AM
Hello there
IDEKMyUsername09:34 AM
Howdy
Mikerobin2509:47 AM
How's it going?
IDEKMyUsername12:13 PM
Not bad.
What's up
Mikerobin2512:36 PM
I'm doing quite alright, How about you?
IDEKMyUsername12:53 PM
Not bad
Mikerobin2501:39 PM
Well, I don't mean to intrude but are you familiar with the term "cryptocurrency", Bitcoin to be precise?
IDEKMyUsername03:10 PM
Yes
Aye
Mikerobin2503:25 PM
Well, I'm at the moment engaging in an outreach aimed at expanding the clientele of my platform and enlightening the populace on the monetary potential of bitcoin trading and mining. Would you be interested in this?
IDEKMyUsername03:26 PM
Uh yeah sure I can look into it.
What does it include?
Mikerobin2503:28 PM
Are you familiar with the term "Bitcoin trading"?
IDEKMyUsername03:29 PM
Yeah somewhat
Like selling and buying it?
Mikerobin2503:33 PM
Well, Bitcoin trading is the process of making profits by buying Bitcoin at a low cost and selling it when the price goes up, This method is referred to as Dollar Cost Averaging(DCA). The Bitcoin trade is volatile, and price move by a significant margin. This activity is done on trading platforms.
Are you following?
IDEKMyUsername04:07 PM
Yep gotcha so far
Sorry had to pickup a call
Mikerobin2506:51 PM
No problem mate. Every platform has an investment procedure and ROI method. Unlike other platforms that engage in day trading (profiting from the volatility of bitcoin which is inefficient), My platform is registered with S9 ant miners that mine the bitcoin you invest to increase exponentially and that’s how you earn profits.
Have you heard of the term "Bitcoin mining"?
IDEKMyUsername06:52 PM
Yes I have
Mikerobin2506:57 PM
Good. For clarification, Bitcoin mining primarily involves generating and earning off the confirmation of blocks of transaction on the network such as the Blockchain network.
This is made possible with the use of special and sophisticated devices called the Bit main devices, Such as the AntMiner S9 and ASIC hardware. These devices are extremely expensive to maintain and require a lot of electricity generation and technical expertise which makes it rarely an option for private individuals who are interested in going into Bitcoin mining. But my platform has been able to provide for this disability.
Are you following?
IDEKMyUsername06:57 PM
I feel ya
Yes
Mikerobin2507:01 PM
Moving on, My platform operates a full S9 Antminer farm. The Antminer s9 has a hash rate of 12.93TH/s which is -+ 7%, Which could generate a ROI of 0.5 BTC within an investment period depending on the investment capital. Note: ROI stands for return of investment while hash rates a measure of how many times the network can attempt to complete this puzzle every second. This means that hash rate is a good indicator of the Bitcoin network's health.
Do i still have your attention?
IDEKMyUsername07:02 PM
Yes
Mikerobin2507:05 PM
Finally, All investments are made and monitored by the client (you) on the platform's website as you earn profits daily and you can contact me a "Broker" on the platform whenever you need assistance or more information.
https://tradeoptiongains.com
IDEKMyUsername07:05 PM
Hm
U have a history of wise investments?
I mean don't really know you so not like your a "professional" of any means
Mikerobin2507:06 PM
Certainly
We've been running for a span of 4 years now with optimum services provided
IDEKMyUsername07:38 PM
oh wow
gimmie some more deets?
how much money would I expect if i put a quick g bar in?
IDEKMyUsername07:53 PM
hm?
Mikerobin2507:54 PM
An investment of $1000 amounts up to the standard ROI stated above which is 50% of 1 bitcoin.
Apologies for the late reply, Was attending to a client of mine.
IDEKMyUsername07:55 PM
so invest of about $1000 would give ruffly 5?
nah ur good fam
like how I go about that tho u know
cause isn't bitcoin like kind of high right now?
Mikerobin2507:57 PM
Yeah though it would have been more profitable if you had started earlier when it was cheaper but you should be expecting more returns due to the halving coming up.
https://www.bitcoinblockhalf.com/
IDEKMyUsername07:58 PM
how high you think its going to get?
Mikerobin2507:59 PM
Its a highly speculative asset but from my experience and following it's previous halving events, Probably 15-18k.
IDEKMyUsername08:01 PM
oh jeez thats like as big as the big boom right?
how you know its gonna do that?
and what if it doesn't lol?
do I just l;ose it all
Mikerobin2508:05 PM
Exactly. If it doesn't, It would remain at its breaking point of 9k or peak point of 10k but i highly doubt it doesn't pump(rise) based on past halving events. You can simply get started by creating your personal account on the platform by which you can start by purchasing bitcoin and you can do this by clicking on the "Register" icon to get started.
IDEKMyUsername08:05 PM
hmmm idk
Kinda need some more security u know what I mean?
Mikerobin2508:08 PM
I understand. Loses are only made when you sell off, You money remains intact whether it rises or falls as long as you don't sell but your ROI is fully attained on your account on the platform.
IDEKMyUsername08:09 PM
o
Mikerobin2508:10 PM
Indeed
Mikerobin2508:20 PM
Any more questions?
IDEKMyUsername08:20 PM
uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
no
Mikerobin2508:22 PM
Okay then, I'm available here if you're interested and need my assistance
Enjoy the rest of your day.
IDEKMyUsername08:25 PM
o
ok
Yesterday
Mikerobin2501:48 PM
https://www.fxstreet.com/cryptocurrencies/news/breaking-bitcoin-price-takes-down-9-000-as-10-000-beckons-202004300334
https://www.independent.co.uk/life-style/gadgets-and-tech/news/bitcoin-price-gold-oil-2020-best-performing-assets-a9492641.html
IDEKMyUsername01:51 PM
O
I bought it
Mikerobin2501:51 PM
Pardon?
IDEKMyUsername01:52 PM
I bought one
Mikerobin2501:52 PM
On what platform?
IDEKMyUsername01:54 PM
I'm idk the one u sent me
Um*
Mikerobin2501:55 PM
Really? When did you do this and why wasn't i informed?
Today
IDEKMyUsername10:19 AM
Oh like last last night
I thought it was expected
U sent me the link and everything
;(
Mikerobin2510:22 AM
You would have informed me so i can enlighten you more on the procedure. Are you aware that it's a mining platform and you earn profits as an investor?
IDEKMyUsername10:23 AM
Yah so what would profit be ya reckon?
For let's say $1000 over liek a year
Mikerobin2510:24 AM
What name did you use in registering the account?
IDEKMyUsername10:24 AM
Uh I'd have to look it up
But how much profit did u say it would be about?
Mikerobin2510:27 AM
0.5 BTC a month depending on your investment capital that is, I would need the name of your account to register it under my personal database so i can provide you with information and assistance when needed.
IDEKMyUsername10:28 AM
O damn that's some big bucks right there
.5 btc like what 4g?
4 times 11 that's $44,000 a month
Mikerobin2510:30 AM
How much did you invest and what is the name of your account?
Your profit is calculated in respect of your investment capital
IDEKMyUsername10:31 AM
Like 11grand
Mikerobin2510:31 AM
And the name?
IDEKMyUsername10:31 AM
Mmmm
How do I find it?
Is there a way on the site
Mikerobin2510:31 AM
What name did you use in creating the account?
Didn't you register?
IDEKMyUsername10:32 AM
Oh like my irl name
I thought u meant like a username
Mikerobin2510:32 AM
Username is what i mean
IDEKMyUsername10:33 AM
It's gonna be under Jeffery Henderson
Jeffery L. Henderson
Mikerobin2510:35 AM
Okay, Give me a second to record it and ascertain your expected profit.
IDEKMyUsername10:35 AM
Sick
Did u find my account?
Mikerobin2510:41 AM
I can't find your records on the platform, Maybe a technical difficulty. Could you please sign in and send me a screenshot of your funds deposited through discord please?
IDEKMyUsername10:41 AM
So tell me mike
Where's the cash?
Mikerobin2510:41 AM
Pardon?
IDEKMyUsername10:41 AM
You lost it, oh you misplaced it.
Now mike you know I don't like to be lied to right?
Mikerobin2510:43 AM
Since i can't find your account on the platform, I guess that's the ending of our conversation.
Good day.
IDEKMyUsername10:43 AM
So why
THE FUCK
ARE YOU LIEING TO ME
Mikerobin2510:44 AM
Prove that you have an account on the platform by sending a screenshot
IDEKMyUsername10:44 AM
I cannot
I did it on
Computer
Mikerobin2510:45 AM
The sign in through your phone, Do i seem like a fool to you?
I have a lot of clients to attend to and i don't have time for games
IDEKMyUsername10:45 AM
I ain't the I one that took another man's money and now can't find it
You don't have other clients
Let's not play games here
How do I get my money out of this depreciating asset?
You better help me get my money out of this or were going to have a major issue
Mike...
IDEKMyUsername11:16 AM
U serious rn bro?
Ur gonna scam me out of my 💰
?
A day will come when you think yourself safe and happy,.
But suddenly your joy will turn to ashes in your mouth.
and you'll know the debt is paid
IDEKMyUsername08:01 PM
Br
You still my 11 grand
Stole
What's your name
Tell me
Or I'll find you
submitted by IDEKMyUsername to Scams [link] [comments]

3rd Global Cryptoasset Benchmarking Study – CCAF, University of Cambridge

Hi BitcoinMining!
We are the cryptocurrency research team from the Cambridge Centre for Alternative Finance (CCAF), an academic research centre at the University of Cambridge. We publish freely available research reports on the cryptocurrency industry.
In 2020 Bitcoin’s issuance per block will drop for the third time since its launch. When the number of blocks hit 630,000 the Bitcoin network will experience another “halving”, where the block reward will drop from 12.5 BTC to 6.25 BTC. As the Bitcoin halving is rapidly approaching, we would like to highlight a few interesting observations and ask some open questions that we have encountered during our research.
1) What will the impact of the 2020 Bitcoin halving be for miners, and in particular smaller ones? In a recent paper entitled “Bitcoin’s Production Cost”, Charles Edwards from Capriole Investments pointed out that (i) Historically, the electrical cost to produce a Bitcoin has represented a price floor in the Bitcoin market price (ii) Based on CCAF’s electrical consumption data, from “The Cambridge Bitcoin Electricity Consumption Index (CBECI)”, 2019 was the least profitable year for Bitcoin Mining in the last 5 years. (iii) Given that the Bitcoin Production Cost will double in the next Bitcoin halving, and that the daily cost of Bitcoin Production therefore will be spread across half as many Bitcoins, a number of questions arise:
· What will be the impact on the smaller miners' businesses?
· What are the core risks small miners face?
· How can smaller miners mitigate this risk?
2) Will we see a greater concentration of mining in the hands of a few? If so, what will the implications be? Back in 2018, when we released the 2nd edition of the Global Cryptoasset Benchmarking Study, “Centralisation of hashpower in the hands of a few” was the greatest concern for small miners. It would be interesting to gauge what the sentiment is in 2020.
· Is the concentration of mining power still the greatest concern for small miners?
· Will this situation worsen after the halving?
· What scenario could mitigate these issues of mining concentration?
3) How will miners deal with concentration risks? In the 2nd edition of the Global Cryptoasset Benchmarking Study, we identified three categories of concentration risk in the mining industry: (i) Hardware manufacturing concentration, (ii) Hashing facility concentration and (iii) Pool concentration. Miners will have to mitigate and deal with concentration risk on all three levels.
· What strategies will small miners likely use to mitigate these risks?
These are some of the questions we hope to answer in the 3rd edition of the Global Cryptoasset Benchmarking Study. In order to gather accurate, relevant and useful benchmarking data, we need your help.
As a company active in the mining industry, perhaps you would take a few moments to answer our Cryptoasset Mining Survey?
The mining survey can be accessed here: https://jbs.eu.qualtrics.com/jfe/form/SV_bEMklTo335cP0Wh
The survey is available in English, Español, Português, 中文, 日本, русский, and 한국어.
Thank you in advance!
submitted by CambridgeAltFin to BitcoinMining [link] [comments]

Transcript of discussion between an ASIC designer and several proof-of-work designers from #monero-pow channel on Freenode this morning

[08:07:01] lukminer contains precompiled cn/r math sequences for some blocks: https://lukminer.org/2019/03/09/oh-kay-v4r-here-we-come/
[08:07:11] try that with RandomX :P
[08:09:00] tevador: are you ready for some RandomX feedback? it looks like the CNv4 is slowly stabilizing, hashrate comes down...
[08:09:07] how does it even make sense to precompile it?
[08:09:14] mine 1% faster for 2 minutes?
[08:09:35] naturally we think the entire asic-resistance strategy is doomed to fail :) but that's a high-level thing, who knows. people may think it's great.
[08:09:49] about RandomX: looks like the cache size was chosen to make it GPU-hard
[08:09:56] looking forward to more docs
[08:11:38] after initial skimming, I would think it's possible to make a 10x asic for RandomX. But at least for us, we will only make an ASIC if there is not a total ASIC hostility there in the first place. That's better for the secret miners then.
[08:13:12] What I propose is this: we are working on an Ethash ASIC right now, and once we have that working, we would invite tevador or whoever wants to come to HK/Shenzhen and we walk you guys through how we would make a RandomX ASIC. You can then process this input in any way you like. Something like that.
[08:13:49] unless asics (or other accelerators) re-emerge on XMR faster than expected, it looks like there is a little bit of time before RandomX rollout
[08:14:22] 10x in what measure? $/hash or watt/hash?
[08:14:46] watt/hash
[08:15:19] so you can make 10 times more efficient double precisio FPU?
[08:16:02] like I said let's try to be productive. You are having me here, let's work together!
[08:16:15] continue with RandomX, publish more docs. that's always helpful.
[08:16:37] I'm trying to understand how it's possible at all. Why AMD/Intel are so inefficient at running FP calculations?
[08:18:05] midipoet ([email protected]/web/irccloud.com/x-vszshqqxwybvtsjm) has joined #monero-pow
[08:18:17] hardware development works the other way round. We start with 1) math then 2) optimization priority 3) hw/sw boundary 4) IP selection 5) physical implementation
[08:22:32] This still doesn't explain at which point you get 10x
[08:23:07] Weren't you the ones claiming "We can accelerate ProgPoW by a factor of 3x to 8x." ? I find it hard to believe too.
[08:30:20] sure
[08:30:26] so my idea: first we finish our current chip
[08:30:35] from simulation to silicon :)
[08:30:40] we love this stuff... we do it anyway
[08:30:59] now we have a communication channel, and we don't call each other names immediately anymore: big progress!
[08:31:06] you know, we russians have a saying "it was smooth on paper, but they forgot about ravines"
[08:31:12] So I need a bit more details
[08:31:16] ha ha. good!
[08:31:31] that's why I want to avoid to just make claims
[08:31:34] let's work
[08:31:40] RandomX comes in Sep/Oct, right?
[08:31:45] Maybe
[08:32:20] We need to audit it first
[08:32:31] ok
[08:32:59] we don't make chips to prove sw devs that their assumptions about hardware are wrong. especially not if these guys then promptly hardfork and move to the next wrong assumption :)
[08:33:10] from the outside, this only means that hw & sw are devaluing each other
[08:33:24] neither of us should do this
[08:33:47] we are making chips that can hopefully accelerate more crypto ops in the future
[08:33:52] signing, verifying, proving, etc.
[08:34:02] PoW is just a feature like others
[08:34:18] sech1: is it easy for you to come to Hong Kong? (visa-wise)
[08:34:20] or difficult?
[08:34:33] or are you there sometimes?
[08:34:41] It's kind of far away
[08:35:13] we are looking forward to more RandomX docs. that's the first step.
[08:35:31] I want to avoid that we have some meme "Linzhi says they can accelerate XYZ by factor x" .... "ha ha ha"
[08:35:37] right? we don't want that :)
[08:35:39] doc is almost finished
[08:35:40] What docs do you need? It's described pretty good
[08:35:41] so I better say nothing now
[08:35:50] we focus on our Ethash chip
[08:36:05] then based on that, we are happy to walk interested people through the design and what else it can do
[08:36:22] that's a better approach from my view than making claims that are laughed away (rightfully so, because no silicon...)
[08:36:37] ethash ASIC is basically a glorified memory controller
[08:36:39] sech1: tevador said something more is coming (he just did it again)
[08:37:03] yes, some parts of RandomX are not described well
[08:37:10] like dataset access logic
[08:37:37] RandomX looks like progpow for CPU
[08:37:54] yes
[08:38:03] it is designed to reflect CPU
[08:38:34] so any ASIC for it = CPU in essence
[08:39:04] of course there are still some things in regular CPU that can be thrown away for RandomX
[08:40:20] uncore parts are not used, but those will use very little power
[08:40:37] except for memory controller
[08:41:09] I'm just surprised sometimes, ok? let me ask: have you designed or taped out an asic before? isn't it risky to make assumptions about things that are largely unknown?
[08:41:23] I would worry
[08:41:31] that I get something wrong...
[08:41:44] but I also worry like crazy that CNv4 will blow up, where you guys seem to be relaxed
[08:42:06] I didn't want to bring up anything RandomX because CNv4 is such a nailbiter... :)
[08:42:15] how do you guys know you don't have asics in a week or two?
[08:42:38] we don't have experience with ASIC design, but RandomX is simply designed to exactly fit CPU capabilities, which is the best you can do anyways
[08:43:09] similar as ProgPoW did with GPUs
[08:43:14] some people say they want to do asic-resistance only until the vast majority of coins has been issued
[08:43:21] that's at least reasonable
[08:43:43] yeah but progpow totally will not work as advertised :)
[08:44:08] yeah, I've seen that comment about progpow a few times already
[08:44:11] which is no surprise if you know it's just a random sales story to sell a few more GPUs
[08:44:13] RandomX is not permanent, we are expecting to switch to ASIC friendly in a few years if possible
[08:44:18] yes
[08:44:21] that makes sense
[08:44:40] linzhi-sonia: how so? will it break or will it be asic-able with decent performance gains?
[08:44:41] are you happy with CNv4 so far?
[08:45:10] ah, long story. progpow is a masterpiece of deception, let's not get into it here.
[08:45:21] if you know chip marketing it makes more sense
[08:45:24] linzhi-sonia: So far? lol! a bit early to tell, don't you think?
[08:45:35] the diff is coming down
[08:45:41] first few hours looked scary
[08:45:43] I remain skeptical: I only see ASICs being reasonable if they are already as ubiquitous as smartphones
[08:45:46] yes, so far so good
[08:46:01] we kbew the diff would not come down ubtil affter block 75
[08:46:10] yes
[08:46:22] but first few hours it looks like only 5% hashrate left
[08:46:27] looked
[08:46:29] now it's better
[08:46:51] the next worry is: when will "unexplainable" hashrate come back?
[08:47:00] you hope 2-3 months? more?
[08:47:05] so give it another couple of days. will probably overshoot to the downside, and then rise a bit as miners get updated and return
[08:47:22] 3 months minimum turnaround, yes
[08:47:28] nah
[08:47:36] don't underestimate asicmakers :)
[08:47:54] you guys don't get #1 priority on chip fabs
[08:47:56] 3 months = 90 days. do you know what is happening in those 90 days exactly? I'm pretty sure you don't. same thing as before.
[08:48:13] we don't do any secret chips btw
[08:48:21] 3 months assumes they had a complete design ready to go, and added the last minute change in 1 day
[08:48:24] do you know who is behind the hashrate that is now bricked?
[08:48:27] innosilicon?
[08:48:34] hyc: no no, and no. :)
[08:48:44] hyc: have you designed or taped out a chip before?
[08:48:51] yes, many years ago
[08:49:10] then you should know that 90 days is not a fixed number
[08:49:35] sure, but like I said, other makers have greater demand
[08:49:35] especially not if you can prepare, if you just have to modify something, or you have more programmability in the chip than some people assume
[08:50:07] we are chipmakers, we would never dare to do what you guys are doing with CNv4 :) but maybe that just means you are cooler!
[08:50:07] and yes, programmability makes some aspect of turnaround easier
[08:50:10] all fine
[08:50:10] I hope it works!
[08:50:28] do you know who is behind the hashrate that is now bricked?
[08:50:29] inno?
[08:50:41] we suspect so, but have no evidence
[08:50:44] maybe we can try to find them, but we cannot spend too much time on this
[08:50:53] it's probably not so much of a secret
[08:51:01] why should it be, right?
[08:51:10] devs want this cat-and-mouse game? devs get it...
[08:51:35] there was one leak saying it's innosilicon
[08:51:36] so you think 3 months, ok
[08:51:43] inno is cool
[08:51:46] good team
[08:51:49] IP design house
[08:51:54] in Wuhan
[08:52:06] they send their people to conferences with fake biz cards :)
[08:52:19] pretending to be other companies?
[08:52:26] sure
[08:52:28] ha ha
[08:52:39] so when we see them, we look at whatever card they carry and laugh :)
[08:52:52] they are perfectly suited for secret mining games
[08:52:59] they made at most $6 million in 2 months of mining, so I wonder if it was worth it
[08:53:10] yeah. no way to know
[08:53:15] but it's good that you calculate!
[08:53:24] this is all about cost/benefit
[08:53:25] then you also understand - imagine the value of XMR goes up 5x, 10x
[08:53:34] that whole "asic resistance" thing will come down like a house of cards
[08:53:41] I would imagine they sell immediately
[08:53:53] the investor may fully understand the risk
[08:53:57] the buyer
[08:54:13] it's not healthy, but that's another discussion
[08:54:23] so mid-June
[08:54:27] let's see
[08:54:49] I would be susprised if CNv4 ASICs show up at all
[08:54:56] surprised*
[08:54:56] why?
[08:55:05] is only an economic question
[08:55:12] yeah should be interesting. FPGAs will be near their limits as well
[08:55:16] unless XMR goes up a lot
[08:55:19] no, not *only*. it's also a technology question
[08:55:44] you believe CNv4 is "asic resistant"? which feature?
[08:55:53] it's not
[08:55:59] cnv4 = Rabdomx ?
[08:56:03] no
[08:56:07] cnv4=cryptinight/r
[08:56:11] ah
[08:56:18] CNv4 is the one we have now, I think
[08:56:21] since yesterday
[08:56:30] it's plenty enough resistant for current XMR price
[08:56:45] that may be, yes!
[08:56:55] I look at daily payouts. XMR = ca. 100k USD / day
[08:57:03] it can hold until October, but it's not asic resistant
[08:57:23] well, last 24h only 22,442 USD :)
[08:57:32] I think 80 h/s per watt ASICs are possible for CNv4
[08:57:38] linzhi-sonia where do you produce your chips? TSMC?
[08:57:44] I'm cruious how you would expect to build a randomX ASIC that outperforms ARM cores for efficiency, or Intel cores for raw speed
[08:57:48] curious
[08:58:01] yes, tsmc
[08:58:21] Our team did the world's first bitcoin asic, Avalon
[08:58:25] and upcoming 2nd gen Ryzens (64-core EPYC) will be a blast at RandomX
[08:58:28] designed and manufactured
[08:58:53] still being marketed?
[08:59:03] linzhi-sonia: do you understand what xmr wants to achieve, community-wise?
[08:59:14] Avalon? as part of Canaan Creative, yes I think so.
[08:59:25] there's not much interesting oing on in SHA256
[08:59:29] Inge-: I would think so, but please speak
[08:59:32] hyc: yes
[09:00:28] linzhi-sonia: i am curious to hear your thoughts. I am fairly new to this space myself...
[09:00:51] oh
[09:00:56] we are grandpas, and grandmas
[09:01:36] yet I have no problem understanding why ASICS are currently reviled.
[09:01:48] xmr's main differentiators to, let's say btc, are anonymity and fungibility
[09:01:58] I find the client terribly slow btw
[09:02:21] and I think the asic-forking since last may is wrong, doesn't create value and doesn't help with the project objectives
[09:02:25] which "the client" ?
[09:02:52] Monero GUI client maybe
[09:03:12] MacOS, yes
[09:03:28] What exactly is slow?
[09:03:30] linzhi-sonia: I run my own node, and use the CLI and Monerujo. Have not had issues.
[09:03:49] staying in sync
[09:03:49] linzhi-sonia: decentralization is also a key principle
[09:03:56] one that Bitcoin has failed to maintain
[09:04:39] hmm
[09:05:00] looks fairly decentralized to me. decentralization is the result of 3 goals imo: resilient, trustless, permissionless
[09:05:28] don't ask a hardware maker about physical decentralization. that's too ideological. we focus on logical decentralization.
[09:06:11] physical decentralization is important. with bulk of bitnoin mining centered on Chinese hydroelectric dams
[09:06:19] have you thought about including block data in the PoW?
[09:06:41] yes, of course.
[09:07:39] is that already in an algo?
[09:08:10] hyc: about "centered on chinese hydro" - what is your source? the best paper I know is this: https://coinshares.co.uk/wp-content/uploads/2018/11/Mining-Whitepaper-Final.pdf
[09:09:01] linzhi-sonia: do you mine on your ASICs before you sell them?
[09:09:13] besides testing of course
[09:09:45] that paper puts Chinese btc miners at 60% max
[09:10:05] tevador: I think everybody learned that that is not healthy long-term!
[09:10:16] because it gives the chipmaker a cost advantage over its own customers
[09:10:33] and cost advantage leads to centralization (physical and logical)
[09:10:51] you guys should know who finances progpow and why :)
[09:11:05] but let's not get into this, ha ha. want to keep the channel civilized. right OhGodAGirl ? :)
[09:11:34] tevador: so the answer is no! 100% and definitely no
[09:11:54] that "self-mining" disease was one of the problems we have now with asics, and their bad reputation (rightfully so)
[09:13:08] I plan to write a nice short 2-page paper or so on our chip design process. maybe it's interesting to some people here.
[09:13:15] basically the 5 steps I mentioned before, from math to physical
[09:13:32] linzhi-sonia: the paper you linked puts 48% of bitcoin mining in Sichuan. the total in China is much more than 60%
[09:13:38] need to run it by a few people to fix bugs, will post it here when published
[09:14:06] hyc: ok! I am just sharing the "best" document I know today. it definitely may be wrong and there may be a better one now.
[09:14:18] hyc: if you see some reports, please share
[09:14:51] hey I am really curious about this: where is a PoW algo that puts block data into the PoW?
[09:15:02] the previous paper I read is from here http://hackingdistributed.com/2018/01/15/decentralization-bitcoin-ethereum/
[09:15:38] hyc: you said that already exists? (block data in PoW)
[09:15:45] it would make verification harder
[09:15:49] linzhi-sonia: https://the-eye.eu/public/Books/campdivision.com/PDF/Computers%20General/Privacy/bitcoin/meh/hashimoto.pdf
[09:15:51] but for chips it would be interesting
[09:15:52] we discussed the possibility about a year ago https://www.reddit.com/Monero/comments/8bshrx/what_we_need_to_know_about_proof_of_work_pow/
[09:16:05] oh good links! thanks! need to read...
[09:16:06] I think that paper by dryja was original
[09:17:53] since we have a nice flow - second question I'm very curious about: has anyone thought about in-protocol rewards for other functions?
[09:18:55] we've discussed micropayments for wallets to use remote nodes
[09:18:55] you know there is a lot of work in other coins about STARK provers, zero-knowledge, etc. many of those things very compute intense, or need to be outsourced to a service (zether). For chipmakers, in-protocol rewards create an economic incentive to accelerate those things.
[09:19:50] whenever there is an in-protocol reward, you may get the power of ASICs doing something you actually want to happen
[09:19:52] it would be nice if there was some economic reward for running a fullnode, but no one has come up with much more than that afaik
[09:19:54] instead of fighting them off
[09:20:29] you need to use asics, not fight them. that's an obvious thing to say for an asicmaker...
[09:20:41] in-protocol rewards can be very powerful
[09:20:50] like I said before - unless the ASICs are so useful they're embedded in every smartphone, I dont see them being a positive for decentralization
[09:21:17] if they're a separate product, the average consumer is not going to buy them
[09:21:20] now I was talking about speedup of verifying, signing, proving, etc.
[09:21:23] they won't even know what they are
[09:22:07] if anybody wants to talk about or design in-protocol rewards, please come talk to us
[09:22:08] the average consumer also doesn't use general purpose hardware to secure blockchains either
[09:22:14] not just for PoW, in fact *NOT* for PoW
[09:22:32] it requires sw/hw co-design
[09:23:10] we are in long-term discussions/collaboration over this with Ethereum, Bitcoin Cash. just talk right now.
[09:23:16] this was recently published though suggesting more uptake though I guess https://btcmanager.com/college-students-are-the-second-biggest-miners-of-cryptocurrency/
[09:23:29] I find it pretty hard to believe their numbers
[09:24:03] well
[09:24:09] sorry, original article: https://www.pcmag.com/news/366952/college-kids-are-using-campus-electricity-to-mine-crypto
[09:24:11] just talk, no? rumors
[09:24:18] college students are already more educated than the average consumer
[09:24:29] we are not seeing many such customers anymore
[09:24:30] it's data from cisco monitoring network traffic
[09:24:33] and they're always looking for free money
[09:24:48] of course anyone with "free" electricity is inclined to do it
[09:24:57] but look at the rates, cannot make much money
[09:26:06] Ethereum is a bloated collection of bugs wrapped in a UI. I suppose they need all the help they can get
[09:26:29] Bitcoin Cash ... just another get rich quick scheme
[09:26:38] hmm :)
[09:26:51] I'll give it back to you, ok? ha ha. arrogance comes before the fall...
[09:27:17] maye we should have a little fun with CNv4 mining :)
[09:27:25] ;)
[09:27:38] come on. anyone who has watched their track record... $75M lost in ETH at DAO hack
[09:27:50] every smart contract that comes along is just waiting for another hack
[09:27:58] I just wanted to throw out the "in-protocol reward" thing, maybe someone sees the idea and wants to cowork. maybe not. maybe it's a stupid idea.
[09:29:18] linzhi-sonia: any thoughts on CN-GPU?
[09:29:55] CN-GPU has one positive aspect - it wastes chip area to implement all 18 hash algorithms
[09:30:19] you will always hear roughly the same feedback from me:
[09:30:52] "This algorithm very different, it heavy use floating point operations to hurt FPGAs and general purpose CPUs"
[09:30:56] the problem is, if it's profitable for people to buy ASIC miners and mine, it's always more profitable for the manufacturer to not sell and mine themselves
[09:31:02] "hurt"
[09:31:07] what is the point of this?
[09:31:15] it totally doesn't work
[09:31:24] you are hurting noone, just demonstrating lack of ability to think
[09:31:41] what is better: algo designed for chip, or chip designed for algo?
[09:31:43] fireice does it on daily basis, CN-GPU is a joke
[09:31:53] tevador: that's not really true, especially in a market with such large price fluctuations as cryptocurrency
[09:32:12] it's far less risky to sell miners than mine with them and pray that price doesn't crash for next six months
[09:32:14] I think it's great that crypto has a nice group of asicmakers now, hw & sw will cowork well
[09:32:36] jwinterm yes, that's why they premine them and sell after
[09:32:41] PoW is about being thermodynamically and cryptographically provable
[09:32:45] premining with them is taking on that risk
[09:32:49] not "fork when we think there are asics"
[09:32:51] business is about risk minimization
[09:32:54] that's just fear-driven
[09:33:05] Inge-: that's roughly the feedback
[09:33:24] I'm not saying it hasn't happened, but I think it's not so simple as saying "it always happens"
[09:34:00] jwinterm: it has certainly happened on BTC. and also on XMR.
[09:34:19] ironically, please think about it: these kinds of algos indeed prove the limits of the chips they were designed for. but they don't prove that you cannot implement the same algo differently! cannot!
[09:34:26] Risk minimization is not starting a business at all.
[09:34:34] proof-of-gpu-limit. proof-of-cpu-limit.
[09:34:37] imagine you have a money printing machine, would you sell it?
[09:34:39] proves nothing for an ASIC :)
[09:35:05] linzhi-sonia: thanks. I dont think anyone believes you can't make a more efficient cn-gpu asic than a gpu - but that it would not be orders of magnitude faster...
[09:35:24] ok
[09:35:44] like I say. these algos are, that's really ironic, designed to prove the limitatios of a particular chip in mind of the designer
[09:35:50] exactly the wrong way round :)
[09:36:16] like the cache size in RandomX :)
[09:36:18] beautiful
[09:36:29] someone looked at GPU designs
[09:37:31] linzhi-sonia can you elaborate? Cache size in RandomX was selected to fit CPU cache
[09:37:52] yes
[09:38:03] too large for GPU
[09:38:11] as I said, we are designing the algorithm to exactly fit CPU capabilities, I do not claim an ASIC cannot be more efficient
[09:38:16] ok!
[09:38:29] when will you do the audit?
[09:38:35] will the results be published in a document or so?
[09:38:37] I claim that single-chip ASIC is not viable, though
[09:39:06] you guys are brave, noone disputes that. 3 anti-asic hardforks now!
[09:39:18] 4th one coming
[09:39:31] 3 forks were done not only for this
[09:39:38] they had scheduled updates in the first place
[09:48:10] Monero is the #1 anti-asic fighter
[09:48:25] Monero is #1 for a lot of reasons ;)
[09:48:40] It's the coin with the most hycs.
[09:48:55] mooooo
[09:59:06] sneaky integer overflow, bug squished
[10:38:00] p0nziph0ne ([email protected]/vpn/privateinternetaccess/p0nziph0ne) has joined #monero-pow
[11:10:53] The convo here is wild
[11:12:29] it's like geo-politics at the intersection of software and hardware manufacturing for thermoeconomic value.
[11:13:05] ..and on a Sunday.
[11:15:43] midipoet: hw and sw should work together and stop silly games to devalue each other. to outsiders this is totally not attractive.
[11:16:07] I appreciate the positive energy here to try to listen, learn, understand.
[11:16:10] that's a start
[11:16:48] <-- p0nziph0ne ([email protected]/vpn/privateinternetaccess/p0nziph0ne) has quit (Quit: Leaving)
[11:16:54] we won't do silly mining against xmr "community" wishes, but not because we couldn'd do it, but because it's the wrong direction in the long run, for both sides
[11:18:57] linzhi-sonia: I agree to some extent. Though, in reality, there will always be divergence between social worlds. Not every body has the same vision of the future. Reaching societal consensus on reality tomorrow is not always easy
[11:20:25] absolutely. especially at a time when there is so much profit to be made from divisiveness.
[11:20:37] someone will want to make that profit, for sure
[11:24:32] Yes. Money distorts.
[11:24:47] Or wealth...one of the two
[11:26:35] Too much physical money will distort rays of light passing close to it indeed.
submitted by jwinterm to Monero [link] [comments]

Introduction and overview of the Bitcoin system

In relation to this post:
https://www.reddit.com/btc/comments/eupegk/technical_review_of_the_past_10_years_and_how_the/
We put together an introductory overview of the Bitcoin System. As this is intended to help increase public understanding of BTC and thus increase it's adoption. What will you learn from the text:
If you do decide to go through the text would love some feedback. Was it clear? Did you get any value from it? Anything that needs to be expanded on? - we are really excited about this project and hope to make it to the best of our abilities.
----

1 Introduction to the Bitcoin System

1.1 Introduction and General Description

There are many definitions and descriptions of Bitcoin. Some describe it as an innovative virtual or crypto currency, some as the system for peer-to–peer electronic cash payment transactions, and some others as decentralized platform and infrastructure for anonymous payment transactions using any type of crypto currency.
In this Report we will adopt the concept that the Bitcoin system is a payment system. It has its own features, its own currency, its own protocols and components, and with all that Bitcoin supports payment transactions. In other words, the core function of the Bitcoin system is to support payments between two parties – the party that makes a payment and the party that receives the payment.
Based on the original concept and the description of the Bitcoin [Bitcoin, 2016], “it is a decentralized digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: transaction management and money issuance are carried out collectively by the network”.
The system is decentralized since its supporting platform blockchain, comprises an infrastructure of multiple distributed servers, mutually linked by an instantaneous broadcasting protocol. Users perform transactions within the open and distributed community of registered users. Digital currency used in the system is not electronic form of fiat currency, but a special form of the currency generated and used only within the Bitcoin system. This concept is based on the notion that money can be interpreted as any object, or any sort of record, that is accepted as payment for goods and services and repayment of debts in a given country or socio-economic context. Bitcoin system is designed around the idea of using cryptography to control the creation and transfer of money, rather than relying on central authorities.
There are several important requirements when making any type of payment and with any currency. The best example of a “perfect” payment transaction that meets all these requirements is payment using cash over-the-counter. When a consumer pays to a merchant using cash over-the-counter, such transaction satisfies all requirements and expectations of both parties. First, the transaction is instantaneous, as the paper bill is transferred hand-to-hand, from the consumer to the merchant. The transaction is cheap, in fact there is no overhead charge to perform transaction, so the merchant receives the full amount. The transaction is irreversible, what is the property beneficial to merchants. The transaction is legal, as the merchant can verify the legality of the paper bill. And, finally, the transaction is anonymous for the consumer as he/she does not need to reveal his/her identity.
The only “problem” with cash over-the-counter is the cash itself, as using and handling cash has many disadvantages.
Bitcoin concept and system solves all issues and problems with the use of cash, but at the same time provides all advantages when performing transactions using digital and communication technologies. So, paying with Bitcoins is effectively payment transaction that uses “digital cash over-the-counter”. The concept of the Bitcoin system provides all advantages and benefits mentioned above with payments using cash over-the-counter, but eliminates the problems of using cash. That is the reason why Bitcoins are often referred to as “digital cash”.
One of significant features of payments using cash over-the-counter is that there are no third parties to participate or assist in the execution and validation of a transaction. This feature makes Bitcoin transactions very efficient and also very cheap to perform. Other types of todays payment systems, for instance using bank-to-bank account transfers or using bankcards, use many additional intermediate parties and use very complicated background infrastructure to validate and clear payment transactions. These infrastructures are complex to establish and operate, they are expensive, and they are vulnerable to attacks and penetrations by hackers. Bitcoin does not use such complex infrastructures, what is the reason that its transactions are efficient and cheap. An additional problem with third-party transaction players is that transaction parties must put the complete trust in all these parties without any means to verify their functionality, correctness, or security.
Bitcoin system uses public-key cryptography to protect the currency and transactions. Logical relationships between transaction parties is direct, peer-to-peer, and the process of validating transactions is based on cryptographic proof-of-work. When performing a transaction, the net effect is that certain amount of Bitcoins is transferred from one cryptographic address to another. Each user may have and use several addresses simultaneously. Each payment transaction is broadcast to the network of distributed transaction processing servers. These servers collect individual transactions, package them into blocks, and send them for validation.
Each block is cryptographically processed by the large number of so called “miners”. They each attempt to create cryptographic hash value that has special form. This is computationally very difficult and time-consuming task, therefore, it is very difficult to perform and repeat. Individual blocks are validated using cryptographic processing procedures that require substantial amount of work and computing power.
Approximately an hour or two after submitting the transaction for validation, each transaction is locked in time and by cryptographic processing by the massive amount of computing power that was used to complete the block. When the block is validated, it is added to the chain of all previous blocks, thus forming a public archive of all blocks and transactions in the system.
One of the most important problems with uncontrolled digital currency, where there are no third parties to validate and approve transactions, is so called double spending. Since the currency is digital, stored at user’s local workstations, in mobile phones, or on network servers, it can be easily copied and sent to multiple recipients multiple times.
Bitcoin system solves this problem with a very interesting approach. It is the first effective example of the solution for the double-spending problem without the need for assistance of any third party. Bitcoin solves this problem by keeping and distributing an archive of all transactions among all the users of the system via a peer-to-peer distribution network. Every transaction that occurs in the Bitcoin system is recorded in that public and distributed transactions ledger. Since the components in that ledger are blocks with transactions and the blocks are “chained” in time and in a cryptographic sequence, the ledger in the Bitcoin system is called blockchain.
That full blockchain of all transactions that were performed in the Bitcoin system before the specific transaction can be used to verify new transactions. The transactions are verified against the blockchain to ensure that the same Bitcoins have not been previously spent. This approach eliminates the double-spending problem. The essence of the verification procedure for a single transaction in fact is the test of the balance of the sending account. The test is very normal and natural: payment of a certain amount of the currency can be made only of the balance of the outgoing account is equal or larger than the payment amount. Current balance of an account is established by tracing all incoming and outgoing transactions for that account.
The procedure to verify the validity of individual transactions and to prevent double-spending is based on the use of special type of cryptographic protocol called public-key cryptography. With this type of cryptographic systems each user has two cryptographic keys. They are mutually related in the sense that, what ever the one key encrypts, the other key can decrypt. One of the two keys is a private key that is kept secret, and the other key is public key that can be shared with all other users in the system. When a user wants to make a payment to another user, the sender transfers certain amount of Bitcoins from his/her account to the account of the receiver. This action is performed by the sender by creating a payment message, called a “transaction,” which contains recipient’s public key – receiving address and payment amount. The transaction is cryptographically processed by the sender’s private key, the operation called digital signing, and as the result digital signature is created and appended to the transaction.
By using sender’s private key every user in the system can verify that the transaction was indeed created by the indicated sender, as his/her private key can successfully decrypt the content of the digital signature. The exchange is authentic, since the transaction was also cryptographically processed with the recipient’s public key, the operation which is called digital enveloping. This transformation guarantees that the transaction can be accepted and processed only by the holder of the corresponding private key, which is the intended recipient.
Every transaction, and thus the transfer of ownership of the specified amount of Bitcoins, is inserted, then time-stamped, and finally displayed in one “block” of the blockchain. Public-key cryptography ensures that all computers in the network have a constantly updated and verified record of all transactions within the Bitcoin network, which prevents double-spending and fraud.

1.2 The Concept and Features of the Bitcoin System

There are many concepts and even more operational payment systems today in the world. Some are standard paper–based, some are digital and network based. What makes Bitcoin unique and distinctive, compared with all other payment systems that are in use today, are several of its core features.
The first of them is that the system uses its own currency. The reason for using its own currency is to make the system independent of financial institutions as trusted third parties. The unit of the currency is called Bitcoin. The currency is so called crypto currency, because it is generated and used based on execution of certain cryptographic algorithms and protocols. Performing specific cryptographic protocols is in the heart of operations to create new Bitcoins, to transfer them between transaction parties, and to validate the correctness of transactions.
Since appearance of Bitcoins, several new systems were introduced that use cryptography to manage its own currency, so all such currencies represent the category of crypto currencies. Later in this Report, some other digital / virtual currencies will be described that are created and managed using some other principles, so they are not called crypto currency. At the time of writing this Report, all such digital virtual currencies were called with general term tokens, sometimes also digital assets tokens. The reason is that they were created by the process called collateralization and therefore they are related to the value of some categories of real world assets which is expressed in digital tokens units.
The second interesting and important feature of the Bitcoin system is that the logical relationship between the two transaction parties is direct, peer-to–peer, i.e. there are no other parties that participate in the transaction. This is an important feature and benefit / advantage of the system that contributes to its efficiency when compared with the todays complex and expensive financial payment infrastructures and protocols. However, for distribution of transactions to their validators and later to all other members in the Bitcoin system the physical flow of each transaction is very complex and includes many parties.
It should be emphasized that performing transactions as direct, peer-to–peer transfers is one of the key features and the most significant reason for many benefits and advantages of the Bitcoin system. This approach is the key feature of the Bitcoin system as it enables security and anonymity of parties, efficiency in performing transactions, scaling of the system, and instantaneous settlement of payments. Therefore, supporting execution and validation of serious business peer–to–peer transactions is one of the core benefits of the blockchain concept, as it changes the current paradigm of Internet applications and transactions. Currently all Internet applications are organized and performed as client–server transactions. Such transactions are not efficient, do not provide sufficient privacy of participants, have dependencies on third parties and usually are vulnerable due to attacks of functional problems with large centralized application servers.
The next very important characteristic of the Bitcoin system is anonymity of users, their accounts, and transactions. This property means that the identities of the participants in the system are not known even to the partners performing a payment transaction. All other system operations – receiving payments, making payments, validating transactions, etc. are also performed anonymously. Interpreting this property correctly, the anonymity of transaction participants is so called pseudo-anonymity. Namely, in the process of validating transactions, all previous transactions of the sender are traced back to the original initial transaction. If that initial transaction was the purchase of Bitcoins at some Bitcoin Exchange, then the identity of the original owner of Bitcoins is known. Most if not all service providers in the Bitcoin system today require very strict identification of participants for the purpose of enforcing legal and regulated transactions and include certain restrictions of transaction frequency and amounts. This procedure, although understandable from the legal and regulatory point of view, has in fact in essence changed one of the core principles of the original concept of the Bitcoin system – full anonymity of users.
Better solution for fully anonymous payment transactions is so called zero–knowledge protocol, where the identity and authorization to perform Bitcoin transactions, is validated by anyone without revealing any identity information of the parties. The only problem with this approach is revealing the identity of transaction participants to law enforcement authorities in case of illegal transactions. But, such authorities have special authorization under the law and they should be enabled to get identifying information about transaction participants in the process of legal law enforcement procedures. But, all other service providers do not have such status, so if Bitcoin principles are strictly followed, they should not be able to have identifying information about system participants.
This approach and potential improvement of the Bitcoin system implies that the system needs one of the classical security services: role–based authorization. In such arrangement, there would be at least two categories of system participants: those that are authorized to maintain and access identifying information about the participants and those that are only authorized to perform transactions. In the first category are legal authorities, like police, driving license authorities, tax authorities, etc. In the context of the standard Identities Management Systems, such participants are called Identity Providers. All others are Identity Verifiers. Therefore, one of the main conclusions about true anonymity in the Bitcoin system is establishment of a sophisticated and multi-role Identities Management System, where some parties will be authorized Identity Providers and all others will be Identity Validators. Finally, referring back to the infrastructure of the Bitcoin system to perform and validate transactions – blockchain, the conclusion is that what is needed, as one of the most important extensions of the current concept of anonymity of Bitcoins participants, is an Identity Management System based itself on the use of blockchain and without Identity Providers as trusted third parties. Creation, distribution, use and validation of identities are transactions in the system, equivalent to payment transactions, so they should also be performed using blockchain protocol. Such system, that can provide reliable identities of all participants may be called Blockchain Identity Management System.
Another very important feature of the original concept of the Bitcoin system is that it is not controlled by any financial institution, by any regulatory body or by any legal financial authority when it comes to issuing Bitcoins and determining their value. This means that the currency used in the system and all transactions are exempted from any legal and financial rules and regulations. The rules controlling Bitcoin system are built in its code. This property is usually called “rule by the technical code”, as the rules of system operations, built in the code of its operational components, control and rule the operations of the system [UK, 2016], Chapter 3. This property is sometimes described as “control by the community”, i.e. the participating users.
This property implies that the value of Bitcoins is determined solely on the market – based on its supply and demand. This is quite natural approach, as the value of shares of companies are also determined on an open trading market. However, such approach implies that the value of Bitcoin, as crypto currency, is volatile related to fiat currencies. This property represent serious problem to perform payments using Bitcoin. It is well-known that volatile currencies are not suitable for payments. The practice of all the years while Bitcoins are in use has shown that its volatility represents one of the major obstacles for its main purpose – to be used as the payment system. In fact, it was announced that in 2019 the total value of Bitcoin transactions performed was about $ 11 T. However, unfortunately, only about 1.3% of those transactions were payments, all others were trading manipulations on exchanges. Based on that, it may be clearly stated that Bitcoin today is not used as the payment system, but as currency manipulation system. This is one of the main problems with the concept and current implementation and deployment of Bitcoin system and in near future may represent the main reason for its decline in popularity.

1.3 Innovative Contributions of the Bitcoin System

Besides an effective procedure to transfer an amount of crypto currency from one user (account) to another user (account), the major and indeed an essential contribution of the concept of the Bitcoin is the solution to the general problem how to establish trust between two mutually unknown and otherwise unrelated parties to such an extent and certainty that sensitive and secure transactions can be performed with full confidence over an open environment, such as Internet. In all current large scale and not only financial systems that problem is solved by using the assistance of third parties. For many (may be even all) current Internet applications and transactions those third parties are integrated and linked into a large, complex, expensive and vulnerable operational infrastructures. Examples of such infrastructures today are bankcard networks supporting global international payments, global international banking networks supporting international financial transfers, Public–Key Infrastructures (PKI), Identity Management Systems, and many others. It is a general consent that such infrastructures are expensive and, more important, vulnerable to external and internal attacks.
In addition to the complexity and vulnerabilities of such current operational supporting infrastructures, another requirement and prerequisite to use their services is that users must put the complete trust in these third parties. Accepting to trust those third–party service providers is the necessary and mandatory prerequisite to use their services.
Therefore, one of the most important contributions of the concept of Bitcoin is that it solves the issue how two parties, mutually unknown to each other in advance and otherwise completely unrelated, can perform sensitive and secure transactions, such as transfer of money – payments, but without assistance of any third party and without the need to place trust in any component of the system.
The practical benefits of solving this problem and the most important consequence of the solution for this problem – Bitcoin system, is that it provides the possibility for one Internet user to transfer not only Bitcoins, but also any other form of digital asset to or shared with another Internet user, such that the transfer is guaranteed to be safe and secure, that everyone knows that the transfer has been performed, and nobody can challenge the legitimacy of the transfer.
This feature of the Bitcoin system generated many very new, creative and innovative ideas where the concept equivalent to the Bitcoin can be used to perform secure and reliable transactions between users in an open community handling any type of digital asset ([Andreesen, 2014], [Sparkes, 2014], [UniCredit, 2016], [BitID, 2015], [PoE, 2015]). The examples of such applications and transactions range from commercial transitions, real estate transactions, energy trading, electronic voting, medical applications, and many others ([Kounelis, 2015], [Muftic, 2016]). The concept of blockchain as technology supporting validation of all such transactions is therefore called disruptive technology.
As the conclusion in this section, we may give a definition of blockchain:
Blockchain is an innovative concept, implemented as an infrastructure comprising multiple and distributed servers, mutually linked by special broadcasting and synchronization protocols, managing immutable objects with the purpose to enable and protect secure peer–to–peer transactions in a global and open environment.

1.4 Summary of Problems and Potential Solutions

In section 1.2 several problems of the Bitcoin system were mentioned and potential solutions for these problems were outlined. Recently, at the time of writing this Technical Report, several sources, mainly personal blogs and articles, appeared with very interesting opinions and statements regarding some other serious Bitcoin problems. Some of them are problems with the concept of the system, some problems of its design, and some problems of operations. In this section some of these problems are briefly summarized including suggestions for their potential solutions. The source of some problems was the article [Ein, 2018].
Problem 1: Complex Crypto Algorithms
Problem: Bitcoins is crypto currency and cryptographic algorithms used in the current version are very complex, based on the concept of proof–of–work, and require long time, special hardware and a lots of energy to perform
Potential Solution: Potential solution fro this problem is to use cryptographic algorithms that are simpler and therefore more efficient to execute and need less energy
Problems with Potential Solution: Lowering the complexity of crypto algorithms introduces vulnerability to hackers. Therefore, what is needed are strong algorithms and simple to perform for regular users and complex to break by hackers
Problem 2: Indirect Transactions, not Peer–to–Peer
Problem: Contrary to the concept claimed, in todays implementation Bitcoin payment transactions are not performed as direct, peer–to–peer transactions. They are performed indirectly, submitted to the Bitcoin network, and recipients receive them indirectly, by downloading validated transactions from the ledger
Potential Solution: Transactions should be performed directly, by transferring them directly between two users
Problems with Potential Solution: The problem with the potential solution is validation of transaction for proof of possession of Bitcoins by the sender and for prevention of double-spending. Therefore, what is needed is the protocol to validate peer–to–peer transactions.
Problem 3: Anonymity of Users not provided
Problem: Contrary to the concept claimed, in todays deployments of additional system components, mainly exchanges, users are not anonymous
Potential Solution: Blockchain–based Distributed Identity Management System with Role-based Authorizations
Problems with Potential Solution: The problem with potential solution is that it depends on trusted third parties with authorized roles. Therefore, what is needed is blockchain-based Identity Management System using hybrid (permissioned and unpermissioned) blockchain
Problem 4: Volatile Value, not suitable for Payments
Problem: Contrary to the concept claimed that Bitcoin is payment system, volatile value of the currency makes it inconvenient for payments
Potential Solution: Crypto currency with stable value
Problems with Potential Solution: The problem with the potential solution is that the value of Bitcoins is determined on the secondary market, during its trading (cash-in / cash-out). Therefore, what is needed is crypto currency that does not have volatile value
The remaining problems in this section are quoted from [Ein, 2018]:
Problem 5: Negative Environmental Impact
Problem: Mining algorithms and operational facilities (“mining farms”) consume too much electrical energy, based on the “proof-of-work” protocol
Potential Solution: Using mining algorithms that consume less energy, either as simpler / lighter crypto algorithms or using alternative crypto protocols to protect transactions integrity (“proof-of-stake”)
Problems with Potential Solution: The problem with the potential solution is that simpler / lighter algorithms open vulnerabilities to hackers while alternative crypto protocols are not backward compatible with the current system
Problem 6: Slow Performance (Delays) / Low Throughput
Problem: Due to blocking and the designed time for protection of transactions (10 minutes) Bitcoin system has very slow performance – transactions are validated in about an hour and transaction processing throughput is about 7 transactions per second
Potential Solution: Using transaction validation algorithms and protocols that do not need blocking of transactions, but transactions should be validated individually
Problems with Potential Solution: There are no serious problems with the proposed potential solution
Problem 7: Limited Number of Bitcoins
Problem: Due hardware and other types of failures, the number of available Bitcoins in the system is constantly reducing
Potential Solution: Potential solution could be to use smaller portions of Bitcoin (“Satoshi”) or introduce hard-fork by splitting the amount of available Bitcoins
Problems with Potential Solution: The problems with the first solution that it is not user-friendly and the problem with the second solution is backwards compatibility.
Problem 8: Real Value of Bitcoins
Problem: The value of Bitcoins is purely psychological and reflects only pure market speculations
Potential Solution: Potential solution could be to peg the value of Bitcoin to local fiat currencies in countries of deployments
Problems with Potential Solution: The problems with the potential solution is that such Bitcoins would be a new class of Bitcoins, not traded on exchanges and not volatile
At the end of this section, it is very interesting to quote two opinions about the future of Bitcoin and blockchain:
[Ein, 2018]: “It seems that Bitcoin will likely cease to have meaningful value*, defeating the whole point and philosophy imagined by Satoshi Nakamoto, the alleged inventor of Bitcoin. Its current value appears to be purely psychological, and the hype seems to be driven by irrational exuberance, greed and speculation. Modern human history has seen many* bubbles*, including the dot-com bubble, the housing bubble and even the tulip bubble. However, when these bubbles exploded, many excellent dot-com companies survived, most houses regained their value and tulips still have meaning and carry value in our lives today. But what will happen when the Bitcoin bubble bursts? What* utility or residual value will Bitcoin have to consumers and businesses? Most likely none*. And this is the real problem with Bitcoin and crypto currencies.*
Bitcoin will likely go down in history as a great technological invention that popularized blockchain yet failed due to its design limitations*. Just like the industrial revolution was fueled by the combustion engine, Nakamoto’s most valuable contribution is the* blockchain polymorphic engine that will further accelerate innovation in the post-information age and immensely affect our lives”.
This quote makes two very important and far–reaching predictions:
(1) Bitcoin, as the payment system will disappear (“. . . will go down in history”), and
(2) The most valuable contribution of the Bitcoin system is blockchain
This article was written in 2018. It is very interesting to notice that at the time of writing this Technical Report, (1) Bitcoin was still “alive” and (2) the concept and deployments of blockchain were in serious trouble.
Based on the principle of positive and creative approach, in the rest of this Technical Report, besides description of all technical details of the Bitcoin system, some potential solutions for its improvement will also be discussed.
However, contrary to the predicted status of Bitcoin, it seems that the predicted status of blockchain, in 2020 was still facing serious problems.
[Barber, 2019]: What's Blockchain Actually Good for, Anyway? For Now, Not Much
“Not long ago, blockchain technology was touted as a way to track tuna, bypass banks, and preserve property records. Reality has proved a much tougher challenge”.

[Lucanus, 2020]: Has Blockchain Failed Before It Even Really Began?

“Just as everyone was getting really excited about its potential, it appears blockchain is dead. For a technology that was supposed to transform and solve seemingly every problem in the world, the enthusiasm is fading pretty quickly”.
At the time of writing this Technical Report, there were many new blockchain – concepts, design and even several deployed and operational instances. Some of them are even very popular, but only among enthusiastic developers. The overall trends with real life deployments, and more and more comments about the capabilities and features of blockchains are appearing with negative connotation. Therefore, seems that even for blockchain some innovative concepts and approaches are needed. They are beyond the scope of this Technical Report and will be addressed in some of our follow-up reports.
submitted by Theus5 to btc [link] [comments]

Introduction and overview of the Bitcoin system

Based on this post I made a bit earlier:
https://www.reddit.com/BitcoinBeginners/comments/euozq4/blockchain_and_btc_technical_review_of_the_past/
We put together an introductory overview of the Bitcoin System. As this is intended for beginners I think this subreddit would be a good place to get some feedback. What will you learn from the text:
If you do decide to go through the text would love some feedback. Was it clear? Did you get any value from it? Anything that needs to be expanded on?
----

1 Introduction to the Bitcoin System

1.1 Introduction and General Description

There are many definitions and descriptions of Bitcoin. Some describe it as an innovative virtual or crypto currency, some as the system for peer-to–peer electronic cash payment transactions, and some others as decentralized platform and infrastructure for anonymous payment transactions using any type of crypto currency.
In this Report we will adopt the concept that the Bitcoin system is a payment system. It has its own features, its own currency, its own protocols and components, and with all that Bitcoin supports payment transactions. In other words, the core function of the Bitcoin system is to support payments between two parties – the party that makes a payment and the party that receives the payment.
Based on the original concept and the description of the Bitcoin [Bitcoin, 2016], “it is a decentralized digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: transaction management and money issuance are carried out collectively by the network”.
The system is decentralized since its supporting platform blockchain, comprises an infrastructure of multiple distributed servers, mutually linked by an instantaneous broadcasting protocol. Users perform transactions within the open and distributed community of registered users. Digital currency used in the system is not electronic form of fiat currency, but a special form of the currency generated and used only within the Bitcoin system. This concept is based on the notion that money can be interpreted as any object, or any sort of record, that is accepted as payment for goods and services and repayment of debts in a given country or socio-economic context. Bitcoin system is designed around the idea of using cryptography to control the creation and transfer of money, rather than relying on central authorities.
There are several important requirements when making any type of payment and with any currency. The best example of a “perfect” payment transaction that meets all these requirements is payment using cash over-the-counter. When a consumer pays to a merchant using cash over-the-counter, such transaction satisfies all requirements and expectations of both parties. First, the transaction is instantaneous, as the paper bill is transferred hand-to-hand, from the consumer to the merchant. The transaction is cheap, in fact there is no overhead charge to perform transaction, so the merchant receives the full amount. The transaction is irreversible, what is the property beneficial to merchants. The transaction is legal, as the merchant can verify the legality of the paper bill. And, finally, the transaction is anonymous for the consumer as he/she does not need to reveal his/her identity.
The only “problem” with cash over-the-counter is the cash itself, as using and handling cash has many disadvantages.
Bitcoin concept and system solves all issues and problems with the use of cash, but at the same time provides all advantages when performing transactions using digital and communication technologies. So, paying with Bitcoins is effectively payment transaction that uses “digital cash over-the-counter”. The concept of the Bitcoin system provides all advantages and benefits mentioned above with payments using cash over-the-counter, but eliminates the problems of using cash. That is the reason why Bitcoins are often referred to as “digital cash”.
One of significant features of payments using cash over-the-counter is that there are no third parties to participate or assist in the execution and validation of a transaction. This feature makes Bitcoin transactions very efficient and also very cheap to perform. Other types of todays payment systems, for instance using bank-to-bank account transfers or using bankcards, use many additional intermediate parties and use very complicated background infrastructure to validate and clear payment transactions. These infrastructures are complex to establish and operate, they are expensive, and they are vulnerable to attacks and penetrations by hackers. Bitcoin does not use such complex infrastructures, what is the reason that its transactions are efficient and cheap. An additional problem with third-party transaction players is that transaction parties must put the complete trust in all these parties without any means to verify their functionality, correctness, or security.
Bitcoin system uses public-key cryptography to protect the currency and transactions. Logical relationships between transaction parties is direct, peer-to-peer, and the process of validating transactions is based on cryptographic proof-of-work. When performing a transaction, the net effect is that certain amount of Bitcoins is transferred from one cryptographic address to another. Each user may have and use several addresses simultaneously. Each payment transaction is broadcast to the network of distributed transaction processing servers. These servers collect individual transactions, package them into blocks, and send them for validation.
Each block is cryptographically processed by the large number of so called “miners”. They each attempt to create cryptographic hash value that has special form. This is computationally very difficult and time-consuming task, therefore, it is very difficult to perform and repeat. Individual blocks are validated using cryptographic processing procedures that require substantial amount of work and computing power.
Approximately an hour or two after submitting the transaction for validation, each transaction is locked in time and by cryptographic processing by the massive amount of computing power that was used to complete the block. When the block is validated, it is added to the chain of all previous blocks, thus forming a public archive of all blocks and transactions in the system.
One of the most important problems with uncontrolled digital currency, where there are no third parties to validate and approve transactions, is so called double spending. Since the currency is digital, stored at user’s local workstations, in mobile phones, or on network servers, it can be easily copied and sent to multiple recipients multiple times.
Bitcoin system solves this problem with a very interesting approach. It is the first effective example of the solution for the double-spending problem without the need for assistance of any third party. Bitcoin solves this problem by keeping and distributing an archive of all transactions among all the users of the system via a peer-to-peer distribution network. Every transaction that occurs in the Bitcoin system is recorded in that public and distributed transactions ledger. Since the components in that ledger are blocks with transactions and the blocks are “chained” in time and in a cryptographic sequence, the ledger in the Bitcoin system is called blockchain.
That full blockchain of all transactions that were performed in the Bitcoin system before the specific transaction can be used to verify new transactions. The transactions are verified against the blockchain to ensure that the same Bitcoins have not been previously spent. This approach eliminates the double-spending problem. The essence of the verification procedure for a single transaction in fact is the test of the balance of the sending account. The test is very normal and natural: payment of a certain amount of the currency can be made only of the balance of the outgoing account is equal or larger than the payment amount. Current balance of an account is established by tracing all incoming and outgoing transactions for that account.
The procedure to verify the validity of individual transactions and to prevent double-spending is based on the use of special type of cryptographic protocol called public-key cryptography. With this type of cryptographic systems each user has two cryptographic keys. They are mutually related in the sense that, what ever the one key encrypts, the other key can decrypt. One of the two keys is a private key that is kept secret, and the other key is public key that can be shared with all other users in the system. When a user wants to make a payment to another user, the sender transfers certain amount of Bitcoins from his/her account to the account of the receiver. This action is performed by the sender by creating a payment message, called a “transaction,” which contains recipient’s public key – receiving address and payment amount. The transaction is cryptographically processed by the sender’s private key, the operation called digital signing, and as the result digital signature is created and appended to the transaction.
By using sender’s private key every user in the system can verify that the transaction was indeed created by the indicated sender, as his/her private key can successfully decrypt the content of the digital signature. The exchange is authentic, since the transaction was also cryptographically processed with the recipient’s public key, the operation which is called digital enveloping. This transformation guarantees that the transaction can be accepted and processed only by the holder of the corresponding private key, which is the intended recipient.
Every transaction, and thus the transfer of ownership of the specified amount of Bitcoins, is inserted, then time-stamped, and finally displayed in one “block” of the blockchain. Public-key cryptography ensures that all computers in the network have a constantly updated and verified record of all transactions within the Bitcoin network, which prevents double-spending and fraud.

1.2 The Concept and Features of the Bitcoin System

There are many concepts and even more operational payment systems today in the world. Some are standard paper–based, some are digital and network based. What makes Bitcoin unique and distinctive, compared with all other payment systems that are in use today, are several of its core features.
The first of them is that the system uses its own currency. The reason for using its own currency is to make the system independent of financial institutions as trusted third parties. The unit of the currency is called Bitcoin. The currency is so called crypto currency, because it is generated and used based on execution of certain cryptographic algorithms and protocols. Performing specific cryptographic protocols is in the heart of operations to create new Bitcoins, to transfer them between transaction parties, and to validate the correctness of transactions.
Since appearance of Bitcoins, several new systems were introduced that use cryptography to manage its own currency, so all such currencies represent the category of crypto currencies. Later in this Report, some other digital / virtual currencies will be described that are created and managed using some other principles, so they are not called crypto currency. At the time of writing this Report, all such digital virtual currencies were called with general term tokens, sometimes also digital assets tokens. The reason is that they were created by the process called collateralization and therefore they are related to the value of some categories of real world assets which is expressed in digital tokens units.
The second interesting and important feature of the Bitcoin system is that the logical relationship between the two transaction parties is direct, peer-to–peer, i.e. there are no other parties that participate in the transaction. This is an important feature and benefit / advantage of the system that contributes to its efficiency when compared with the todays complex and expensive financial payment infrastructures and protocols. However, for distribution of transactions to their validators and later to all other members in the Bitcoin system the physical flow of each transaction is very complex and includes many parties.
It should be emphasized that performing transactions as direct, peer-to–peer transfers is one of the key features and the most significant reason for many benefits and advantages of the Bitcoin system. This approach is the key feature of the Bitcoin system as it enables security and anonymity of parties, efficiency in performing transactions, scaling of the system, and instantaneous settlement of payments. Therefore, supporting execution and validation of serious business peer–to–peer transactions is one of the core benefits of the blockchain concept, as it changes the current paradigm of Internet applications and transactions. Currently all Internet applications are organized and performed as client–server transactions. Such transactions are not efficient, do not provide sufficient privacy of participants, have dependencies on third parties and usually are vulnerable due to attacks of functional problems with large centralized application servers.
The next very important characteristic of the Bitcoin system is anonymity of users, their accounts, and transactions. This property means that the identities of the participants in the system are not known even to the partners performing a payment transaction. All other system operations – receiving payments, making payments, validating transactions, etc. are also performed anonymously. Interpreting this property correctly, the anonymity of transaction participants is so called pseudo-anonymity. Namely, in the process of validating transactions, all previous transactions of the sender are traced back to the original initial transaction. If that initial transaction was the purchase of Bitcoins at some Bitcoin Exchange, then the identity of the original owner of Bitcoins is known. Most if not all service providers in the Bitcoin system today require very strict identification of participants for the purpose of enforcing legal and regulated transactions and include certain restrictions of transaction frequency and amounts. This procedure, although understandable from the legal and regulatory point of view, has in fact in essence changed one of the core principles of the original concept of the Bitcoin system – full anonymity of users.
Better solution for fully anonymous payment transactions is so called zero–knowledge protocol, where the identity and authorization to perform Bitcoin transactions, is validated by anyone without revealing any identity information of the parties. The only problem with this approach is revealing the identity of transaction participants to law enforcement authorities in case of illegal transactions. But, such authorities have special authorization under the law and they should be enabled to get identifying information about transaction participants in the process of legal law enforcement procedures. But, all other service providers do not have such status, so if Bitcoin principles are strictly followed, they should not be able to have identifying information about system participants.
This approach and potential improvement of the Bitcoin system implies that the system needs one of the classical security services: role–based authorization. In such arrangement, there would be at least two categories of system participants: those that are authorized to maintain and access identifying information about the participants and those that are only authorized to perform transactions. In the first category are legal authorities, like police, driving license authorities, tax authorities, etc. In the context of the standard Identities Management Systems, such participants are called Identity Providers. All others are Identity Verifiers. Therefore, one of the main conclusions about true anonymity in the Bitcoin system is establishment of a sophisticated and multi-role Identities Management System, where some parties will be authorized Identity Providers and all others will be Identity Validators. Finally, referring back to the infrastructure of the Bitcoin system to perform and validate transactions – blockchain, the conclusion is that what is needed, as one of the most important extensions of the current concept of anonymity of Bitcoins participants, is an Identity Management System based itself on the use of blockchain and without Identity Providers as trusted third parties. Creation, distribution, use and validation of identities are transactions in the system, equivalent to payment transactions, so they should also be performed using blockchain protocol. Such system, that can provide reliable identities of all participants may be called Blockchain Identity Management System.
Another very important feature of the original concept of the Bitcoin system is that it is not controlled by any financial institution, by any regulatory body or by any legal financial authority when it comes to issuing Bitcoins and determining their value. This means that the currency used in the system and all transactions are exempted from any legal and financial rules and regulations. The rules controlling Bitcoin system are built in its code. This property is usually called “rule by the technical code”, as the rules of system operations, built in the code of its operational components, control and rule the operations of the system [UK, 2016], Chapter 3. This property is sometimes described as “control by the community”, i.e. the participating users.
This property implies that the value of Bitcoins is determined solely on the market – based on its supply and demand. This is quite natural approach, as the value of shares of companies are also determined on an open trading market. However, such approach implies that the value of Bitcoin, as crypto currency, is volatile related to fiat currencies. This property represent serious problem to perform payments using Bitcoin. It is well-known that volatile currencies are not suitable for payments. The practice of all the years while Bitcoins are in use has shown that its volatility represents one of the major obstacles for its main purpose – to be used as the payment system. In fact, it was announced that in 2019 the total value of Bitcoin transactions performed was about $ 11 T. However, unfortunately, only about 1.3% of those transactions were payments, all others were trading manipulations on exchanges. Based on that, it may be clearly stated that Bitcoin today is not used as the payment system, but as currency manipulation system. This is one of the main problems with the concept and current implementation and deployment of Bitcoin system and in near future may represent the main reason for its decline in popularity.

1.3 Innovative Contributions of the Bitcoin System

Besides an effective procedure to transfer an amount of crypto currency from one user (account) to another user (account), the major and indeed an essential contribution of the concept of the Bitcoin is the solution to the general problem how to establish trust between two mutually unknown and otherwise unrelated parties to such an extent and certainty that sensitive and secure transactions can be performed with full confidence over an open environment, such as Internet. In all current large scale and not only financial systems that problem is solved by using the assistance of third parties. For many (may be even all) current Internet applications and transactions those third parties are integrated and linked into a large, complex, expensive and vulnerable operational infrastructures. Examples of such infrastructures today are bankcard networks supporting global international payments, global international banking networks supporting international financial transfers, Public–Key Infrastructures (PKI), Identity Management Systems, and many others. It is a general consent that such infrastructures are expensive and, more important, vulnerable to external and internal attacks.
In addition to the complexity and vulnerabilities of such current operational supporting infrastructures, another requirement and prerequisite to use their services is that users must put the complete trust in these third parties. Accepting to trust those third–party service providers is the necessary and mandatory prerequisite to use their services.
Therefore, one of the most important contributions of the concept of Bitcoin is that it solves the issue how two parties, mutually unknown to each other in advance and otherwise completely unrelated, can perform sensitive and secure transactions, such as transfer of money – payments, but without assistance of any third party and without the need to place trust in any component of the system.
The practical benefits of solving this problem and the most important consequence of the solution for this problem – Bitcoin system, is that it provides the possibility for one Internet user to transfer not only Bitcoins, but also any other form of digital asset to or shared with another Internet user, such that the transfer is guaranteed to be safe and secure, that everyone knows that the transfer has been performed, and nobody can challenge the legitimacy of the transfer.
This feature of the Bitcoin system generated many very new, creative and innovative ideas where the concept equivalent to the Bitcoin can be used to perform secure and reliable transactions between users in an open community handling any type of digital asset ([Andreesen, 2014], [Sparkes, 2014], [UniCredit, 2016], [BitID, 2015], [PoE, 2015]). The examples of such applications and transactions range from commercial transitions, real estate transactions, energy trading, electronic voting, medical applications, and many others ([Kounelis, 2015], [Muftic, 2016]). The concept of blockchain as technology supporting validation of all such transactions is therefore called disruptive technology.
As the conclusion in this section, we may give a definition of blockchain:
Blockchain is an innovative concept, implemented as an infrastructure comprising multiple and distributed servers, mutually linked by special broadcasting and synchronization protocols, managing immutable objects with the purpose to enable and protect secure peer–to–peer transactions in a global and open environment.

1.4 Summary of Problems and Potential Solutions

In section 1.2 several problems of the Bitcoin system were mentioned and potential solutions for these problems were outlined. Recently, at the time of writing this Technical Report, several sources, mainly personal blogs and articles, appeared with very interesting opinions and statements regarding some other serious Bitcoin problems. Some of them are problems with the concept of the system, some problems of its design, and some problems of operations. In this section some of these problems are briefly summarized including suggestions for their potential solutions. The source of some problems was the article [Ein, 2018].
Problem 1: Complex Crypto Algorithms
Problem: Bitcoins is crypto currency and cryptographic algorithms used in the current version are very complex, based on the concept of proof–of–work, and require long time, special hardware and a lots of energy to perform
Potential Solution: Potential solution fro this problem is to use cryptographic algorithms that are simpler and therefore more efficient to execute and need less energy
Problems with Potential Solution: Lowering the complexity of crypto algorithms introduces vulnerability to hackers. Therefore, what is needed are strong algorithms and simple to perform for regular users and complex to break by hackers
Problem 2: Indirect Transactions, not Peer–to–Peer
Problem: Contrary to the concept claimed, in todays implementation Bitcoin payment transactions are not performed as direct, peer–to–peer transactions. They are performed indirectly, submitted to the Bitcoin network, and recipients receive them indirectly, by downloading validated transactions from the ledger
Potential Solution: Transactions should be performed directly, by transferring them directly between two users
Problems with Potential Solution: The problem with the potential solution is validation of transaction for proof of possession of Bitcoins by the sender and for prevention of double-spending. Therefore, what is needed is the protocol to validate peer–to–peer transactions.
Problem 3: Anonymity of Users not provided
Problem: Contrary to the concept claimed, in todays deployments of additional system components, mainly exchanges, users are not anonymous
Potential Solution: Blockchain–based Distributed Identity Management System with Role-based Authorizations
Problems with Potential Solution: The problem with potential solution is that it depends on trusted third parties with authorized roles. Therefore, what is needed is blockchain-based Identity Management System using hybrid (permissioned and unpermissioned) blockchain
Problem 4: Volatile Value, not suitable for Payments
Problem: Contrary to the concept claimed that Bitcoin is payment system, volatile value of the currency makes it inconvenient for payments
Potential Solution: Crypto currency with stable value
Problems with Potential Solution: The problem with the potential solution is that the value of Bitcoins is determined on the secondary market, during its trading (cash-in / cash-out). Therefore, what is needed is crypto currency that does not have volatile value
The remaining problems in this section are quoted from [Ein, 2018]:
Problem 5: Negative Environmental Impact
Problem: Mining algorithms and operational facilities (“mining farms”) consume too much electrical energy, based on the “proof-of-work” protocol
Potential Solution: Using mining algorithms that consume less energy, either as simpler / lighter crypto algorithms or using alternative crypto protocols to protect transactions integrity (“proof-of-stake”)
Problems with Potential Solution: The problem with the potential solution is that simpler / lighter algorithms open vulnerabilities to hackers while alternative crypto protocols are not backward compatible with the current system
Problem 6: Slow Performance (Delays) / Low Throughput
Problem: Due to blocking and the designed time for protection of transactions (10 minutes) Bitcoin system has very slow performance – transactions are validated in about an hour and transaction processing throughput is about 7 transactions per second
Potential Solution: Using transaction validation algorithms and protocols that do not need blocking of transactions, but transactions should be validated individually
Problems with Potential Solution: There are no serious problems with the proposed potential solution
Problem 7: Limited Number of Bitcoins
Problem: Due hardware and other types of failures, the number of available Bitcoins in the system is constantly reducing
Potential Solution: Potential solution could be to use smaller portions of Bitcoin (“Satoshi”) or introduce hard-fork by splitting the amount of available Bitcoins
Problems with Potential Solution: The problems with the first solution that it is not user-friendly and the problem with the second solution is backwards compatibility.
Problem 8: Real Value of Bitcoins
Problem: The value of Bitcoins is purely psychological and reflects only pure market speculations
Potential Solution: Potential solution could be to peg the value of Bitcoin to local fiat currencies in countries of deployments
Problems with Potential Solution: The problems with the potential solution is that such Bitcoins would be a new class of Bitcoins, not traded on exchanges and not volatile
At the end of this section, it is very interesting to quote two opinions about the future of Bitcoin and blockchain:
[Ein, 2018]: “It seems that Bitcoin will likely cease to have meaningful value, defeating the whole point and philosophy imagined by Satoshi Nakamoto, the alleged inventor of Bitcoin. Its current value appears to be purely psychological, and the hype seems to be driven by irrational exuberance, greed and speculation. Modern human history has seen many bubbles, including the dot-com bubble, the housing bubble and even the tulip bubble. However, when these bubbles exploded, many excellent dot-com companies survived, most houses regained their value and tulips still have meaning and carry value in our lives today. But what will happen when the Bitcoin bubble bursts? What utility or residual value will Bitcoin have to consumers and businesses? Most likely none. And this is the real problem with Bitcoin and crypto currencies.
Bitcoin will likely go down in history as a great technological invention that popularized blockchain yet failed due to its design limitations. Just like the industrial revolution was fueled by the combustion engine, Nakamoto’s most valuable contribution is the blockchain polymorphic engine that will further accelerate innovation in the post-information age and immensely affect our lives”.
This quote makes two very important and far–reaching predictions:
(1) Bitcoin, as the payment system will disappear (“. . . will go down in history”), and
(2) The most valuable contribution of the Bitcoin system is blockchain
This article was written in 2018. It is very interesting to notice that at the time of writing this Technical Report, (1) Bitcoin was still “alive” and (2) the concept and deployments of blockchain were in serious trouble.
Based on the principle of positive and creative approach, in the rest of this Technical Report, besides description of all technical details of the Bitcoin system, some potential solutions for its improvement will also be discussed.
However, contrary to the predicted status of Bitcoin, it seems that the predicted status of blockchain, in 2020 was still facing serious problems.
[Barber, 2019]: What's Blockchain Actually Good for, Anyway? For Now, Not Much
“Not long ago, blockchain technology was touted as a way to track tuna, bypass banks, and preserve property records. Reality has proved a much tougher challenge”.

[Lucanus, 2020]: Has Blockchain Failed Before It Even Really Began?

“Just as everyone was getting really excited about its potential, it appears blockchain is dead. For a technology that was supposed to transform and solve seemingly every problem in the world, the enthusiasm is fading pretty quickly”.
At the time of writing this Technical Report, there were many new blockchain – concepts, design and even several deployed and operational instances. Some of them are even very popular, but only among enthusiastic developers. The overall trends with real life deployments, and more and more comments about the capabilities and features of blockchains are appearing with negative connotation. Therefore, seems that even for blockchain some innovative concepts and approaches are needed. They are beyond the scope of this Technical Report and will be addressed in some of our follow-up reports.
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