CheckLockTimeVerify, or How a Time-Lock Patch Will Boost Bitcoin's Potential

By Aaron van Wirdum on Nov 04, 2015

CheckLockTimeVerify (CLTV) has been merged into Bitcoin Core. This is generally considered great news, because it means that Bitcoin...

Bitcoin Finally Gets an Approved Unicode Character Point

By Jacob Donnelly on Nov 03, 2015

As obvious an oversight as it could be, attempting to type the bitcoin symbol via text, email, or on webpages is not the easiest thing...

Debunking the 11 Most Stubborn Lightning Network Myths

By Aaron van Wirdum on Oct 14, 2015

Earlier this year, Joseph Poon and Thaddeus Dryja released the Lightning Network white paper. In it they theorize how a layer on top of...

Blockstream to Launch First, Instant-Settlement Sidechain for Bitcoin Exchanges

By Aaron van Wirdum on Oct 13, 2015

Blockstream has announced it will launch its first commercial Bitcoin sidechain by early 2016. The sidechain, codenamed “Liquid,...

Should Bitcoin Have Regularly Scheduled Hard Forks?

By Kyle Torpey on Oct 13, 2015

Hard forks are a rather contentious issue in Bitcoin. The controversy surrounding hard forks can be seen most prominently in the con...

The Who, What, Why and How of the Ongoing Transaction Malleability Attack

By Aaron van Wirdum on Oct 07, 2015

For the past several days*, the Bitcoin network has been plagued by a so-called “transaction malleability attack.” Bitcoin users hav...

Hot Cryptocurrency Trends: Delegated Proof of Stake

By Guest Author on Aug 28, 2014

This is a guest post by Max WrightDisclaimer: Max Wright owns both Bitcoin and BitSharesX. Wright’s critique of the security concerns...

Digital vs. Virtual Currencies

By Andrew Wagner on Aug 22, 2014

This article originally appeared in Bitcoin Magazine Issue 22. There’s a lot of misunderstanding around the terms “virtual” and â€...

Multisig: A Revolution Incomplete

By Vitalik Buterin on Jul 28, 2014

The author is involved in the Ethereum project. The author has no relationship with BitGo, Bitrated, Codius or CryptoCorp.Update: Ben Da...

Thinking in Transactions

By Roland Kofler on Jun 01, 2014

This post is also in issue 18.Every Bitcoin transaction runs a small program that describes under which conditions the transaction is va...

Security – Never Forget

By Joel Dalais on May 28, 2014

Side Chains: The How, The Challenges and the Potential

By Vitalik Buterin on Apr 16, 2014

Disclosure: the author of this article is the founder and Chief Scientist of the Ethereum projectLast week, Adam Back and Austin Hill ca...

Smart Property is One Small Step Closer with Coincollectr Prototype

By David Z. Morris on Mar 28, 2014

When I walked into Matt Branton’s downtown office in early March to talk about his Bitcoin-based content micropayments system Coinlock...

Irish Company Unveils World’s First Colored Coins Web Wallet

By S.T. Andrews on Mar 25, 2014

March 22, 2014 (Dublin, Ireland) – The Irish company behind the Bitcoin prediction market Predictious is announcing the private beta l...

Bitcoin Multisig Wallet: The Future of Bitcoin

By Vitalik Buterin on Mar 13, 2014

Pybitcointools Multisig Tutorial

By Vitalik Buterin on Mar 13, 2014

There has been a large amount of interest in multisignature transaction technology in the past year, especially with the recent announce...

Agora Voting Proposes a Bitcoin Based Voting System

By Ferdinand Reyes on Jan 21, 2014

We talk with Eduardo Robles, and along with David Ruescas, they are the main proponents of the Agora Voting project.Ferdinand Reyes: Wh...

How to Secure a Blockchain with Zero Energy

By Max Kaye on Jan 16, 2014

Proof of Work (PoW) is the only external method of powering the distributed consensus engine known as a blockchain. However, at least tw...

Mining Pool Centralization At Crisis Levels

By Vitalik Buterin on Jan 09, 2014

One of the key requirements for the Bitcoin network to be secure is that mining, the distributed process in which the network processes...

Deterministic Wallets, Their Advantages and their Understated Flaws

By Vitalik Buterin on Nov 26, 2013

cIf you have been following the last year of progress in Bitcoin wallet development, you will have likely already heard of one of the la...

Mastercoin: A Second-Generation Protocol on the Bitcoin Blockchain

By Vitalik Buterin on Nov 04, 2013

Alternative currencies have become a popular topic in the Bitcoin space. We have Litecoin and Primecoin introducing alternative mining a...

Selfish Mining: A 25% Attack Against the Bitcoin Network

By Vitalik Buterin on Nov 04, 2013

One of Bitcoin’s core security guarantees is that, for an attacker to be able to successfully interfere with the Bitcoin network and b...

Satoshi’s Genius: Unexpected Ways in which Bitcoin Dodged Some Cryptographic Bullets

By Vitalik Buterin on Oct 28, 2013

As far as open-source protocols go, one area in which Bitcoin is unique is the sheer difficulty of making any changes to the protocol. U...

Bitcoin in Israel, Part 3: Interview on Alternative Currencies

By Vitalik Buterin on Oct 27, 2013

Alternative cryptocurrencies have been an important part of the Bitcoin ecosystem for a long time; the first one to reach any prominence...

Ripple is Officially Open Source

By Vitalik Buterin on Sep 27, 2013

Ripple Labs (formerly OpenCoin) CTO Stefan Thomas has announced that, as of today, the source code for the peer-to-peer node behind the...

What Firstbits Is and Why You Should Implement It

By Vitalik Buterin on Sep 15, 2013

Recently, there has been a considerable amount of interest in making Bitcoin usable in environments where the technological comforts tha...

In Defense of Alternative Cryptocurrencies

By Vitalik Buterin on Sep 07, 2013

Alternative cryptocurrencies, like Litecoin, Primecoin and PPCoin, have gotten a significant amount of bad press recently. Lead Bitcoin...

Trustless Bitcoin Anonymity Here at Last

By Vitalik Buterin on Aug 29, 2013

With representatives from the Bitcoin Foundation currently meeting high-level officials from a number of US regulatory agencies, the top...

Bitcoin Volatility – The 4 perspectives

By Radoslav Albrecht on Aug 27, 2013

Cointerra Planning to Release 2 Petahashes of Mining Power by December

By Vitalik Buterin on Aug 27, 2013

The mining company Cointerra has announced its official launch today, offering what may be the most advanced Bitcoin mining hardware cur...

What Proof of Stake Is And Why It Matters

By Vitalik Buterin on Aug 26, 2013

If you have been involved in Bitcoin for any significant length of time, you have probably at least heard of the idea of “proof of wor...

Feathercoin: Interview With Peter Bushnell

By Vitalik Buterin on Aug 13, 2013

In this past month, it seems like alternate cryptocurrencies have been all the rage. Earlier last month, Sunny King released Primecoin,...

Critical Vulnerability Found In Android Wallets

By Vitalik Buterin on Aug 12, 2013

A critical security vulnerability has been found in Android which renders bitcoins stored in Android Bitcoin wallets vulnerable to theft...

What Libbitcoin and SX are And Why They Matter

By Vitalik Buterin on Aug 09, 2013

Amir Taaki’s libbitcoin has come to be one of the most advanced alternative implementations of the Bitcoin protocol in existence. Alth...

Bitcoin Is Not Quantum-Safe, And How We Can Fix It When Needed

By Vitalik Buterin on Jul 31, 2013

In the past year or so, it has come to be a known fact in Bitcoin technical circles that Bitcoin, in its current form, is partially quan...

Is $100 the New $5? How the Post-Bubble Decline May Already Be Over

By Vitalik Buterin on Jul 30, 2013

For the past three months, the Bitcoin economy has undoubtedly been in a correction phase. The number of major new adoption announcement...

Linux distribution packaging and Bitcoin

By Luke-Jr on Jul 23, 2013

This note summarises the dangers inherent in the Linux distribution packaging model for Bitcoin, and forms a request from upstream maint...

Keeping Track of the Coins: All The Best Cryptocurrency Websites

By Vitalik Buterin on Jul 16, 2013

Alternate cryptocurrencies are all the rage now. Over the past two years, we have seen the emergence of Namecoin, Litecoin, Freicoin, Te...

Primecoin Has Exchange, Casino, Already Breaking World Records

By Vitalik Buterin on Jul 11, 2013

Primecoin has come far in the last few days. Less than a day after founder Sunny King released the genesis block and I first covered the...

Primecoin: The Cryptocurrency Whose Mining is Actually Useful

By Vitalik Buterin on Jul 08, 2013

Read the exclusive interview with Primecoin’s creator Sunny King in the issue 13 of Bitcoin Magazine. One of the disadvantages of Bitc...

Solving the Slow In-Person Transaction Problem

By Vitalik Buterin on Jun 26, 2013

One of the crucial features for a digital transaction medium to be viable for payments made in person is that it should be reliable, and...

Bitcoin Panel Featured at the LeWeb London Conference

By Elizabeth Ploshay on Jun 08, 2013

Yesterday, the Bitcoin Currency was featured at yet another prominent venue, the LeWeb London Conference. Martin Bryant (Managing Editor...

Bitcoin Self-Defense, Part I: Wallet Protection

By Vitalik Buterin on May 17, 2013

Wallet security has always been a primary concern in the Bitcoin development community. Although no other payment system in existence gr...

Last Forking Warning

By Neil Fincham on May 13, 2013

It has been just over two months since the bitcoin block chain was rocked by a near disastrous fork causing the bitcoin price to crash.T...

btcd: A Full Alternative Bitcoin Implementation, Written In Go

By Vitalik Buterin on May 09, 2013

Conformal, a company focused on building open-source software for privacy and security, has revealed their latest project: btcd, a full...

Introducing Carbon Wallet

By Vitalik Buterin on May 06, 2013

Carbon Wallet, a new service seeking to be the next great innovation in secure online wallets, is launching today. Currently, there are...

Bitcoin Developers Adding $0.007 Minimum Transaction Output Size

By Vitalik Buterin on May 06, 2013

Clarifications:1. This is NOT a change to the Bitcoin protocol, it is a change to default transaction inclusion and propagation rules. I...

OzCoin Hacked, Stolen Funds Seized and Returned by StrongCoin

By Vitalik Buterin on Apr 24, 2013

OzCoin, one of the larger Bitcoin mining pools, has reported that an unknown attacker managed to hack into their server, defacing their...

Butterfly Labs Ships First Finished ASIC For Review

By Vitalik Buterin on Apr 22, 2013

After nearly six months of delays, Butterfly Labs has finally released a copy of what appears to be the final version of one of their lo...

The Bitcoin Crash: An Examination

By Vitalik Buterin on Apr 14, 2013

April 10 was perhaps the most eventful day on the Bitcoin markets in nearly two years. The price started the day at roughly $200, briefl...

Bitcoin-Mining Malware Spreads Through Skype

By David Perry on Apr 13, 2013

Mt. Gox DDoS and the Panic-Sell Price Drop

By Ryan Taylor on Apr 06, 2013

Distributed Denial-of-Services (DDOS) attacks conducted against Mt. Gox over the last few days were responsible for server lag and downt...

Bitcoin Developer Confirms Butterfly Labs ASIC

By Vitalik Buterin on Apr 01, 2013

Bitcoin developer Luke Dashjr has confirmed that a prototypes Butterfly Labs ASIC is now hashing. The device is still far from full capa...

Bitcoin Network Shaken by Blockchain Fork

By Vitalik Buterin on Mar 13, 2013

Yesterday, the Bitcoin network experienced one of the most serious hiccups that we have seen in the past four years. Starting from block...

Bitcoin’s Security Coming of Age

By Vitalik Buterin on Mar 12, 2013

One of the greatest technical challenges in working with Bitcoin has always been finding an effective way to secure it. Although financi...

ASICMiner Starts Hashing

By Vitalik Buterin on Feb 15, 2013

Today, ASICMiner, one of the three major developers of ASIC (application-specific integrated circuit)-based Bitcoin mining hardware, has...

Working Avalon ASIC Confirmed, Hashing At 68 GH/s

By Vitalik Buterin on Jan 31, 2013

Photo taken by Jeff GarzikJeff Garzik has just received the first ASIC mining computer to hit the consumer market, and has confirmed on...

Instant Transaction Fraud: An Explanation

By Vitalik Buterin on Dec 17, 2012

A few hours ago, a poster on the Bitcointalk forum announced that he was able to successfully reverse an unconfirmed transaction against...

Bitcoin Breaks the Ten Dollar Barrier

By Justin Porter on Aug 03, 2012

As of 18:36:30 GMT on August 2nd, Bitcoin broke the $10 price barrier on MtGox for the first time in 2012. Bitcoin closed at $9.35 at th...

Bitcoin Price Exceeds January High of $7.22

By Vitalik Buterin on Jul 12, 2012

On Tuesday, Bitcoin finally exceeded the $7.22 high that the price reached in January, briefly touching $7.25 in the (North American) af...

Growing Decentralization in the Bitcoin Economy

By Vitalik Buterin on Jun 05, 2012

Centralization has always been an issue in the Bitcoin ecosystem. The original spirit of the currency, as envisioned by its early adopte...

L’objection du gaspillage d’électricité de Bitcoins

By Vitalik Buterin on Jun 04, 2012

Microsoft-Funded Startup Aims to Disrupt File Sharing Networks; Is Bitcoin Vulnerable?

By Vitalik Buterin on May 24, 2012

The Russian-based PiratePay startup is attempting an old, but in this application novel, strategy to help Hollywood fight against the fi...

The Strange Antics of the Bitcoinica Thief

By Vitalik Buterin on May 21, 2012

The internet and the blockchain that power Bitcoin are unique in that they make any significant events in the Bitcoin ecosystem public,...

Brain Wallets: The What and the How

By Vitalik Buterin on Apr 08, 2012

Of all the formalized monetary systems that have ever been used by mankind, Bitcoin is unique in the fact that it exists entirely as pur...

The Wasted Electricity Objection to Bitcoin

By Vitalik Buterin on Feb 28, 2012