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Thinking About Smart Contract Security
Over the last day with the community's help we have crowdsourced alist of all of the major bugs with smart contracts on Ethereum so far, including both the DAO as well as various smaller 100-10000 ETH thefts and losses in games and token contracts. This list (original source here)...
Published on: June 19, 2016 | Source:
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CRITICAL UPDATE Re: DAO Vulnerability
An attack has been found and exploited in the DAO, and the attacker is currently in the process of draining the ether contained in the DAO into a child DAO. The attack is a recursive calling vulnerability,
Published on: June 17, 2016 | Source:The Ethereum Foundation welcomes Microsoft as the Premiere Sponsor of Devcon2, Shanghai 19-21 September, 2016
London, United Kingdom, June 14, 2016 β The Ethereum Foundation is pleased to announce Microsoft as the Premiere Sponsor of Devcon2, the Ethereum developer conference in Shanghai, 19-21 September, 2016. Devcon2, which will showcase the most up-to-date research and development work supported by the Foundation, also represents the most...
Published on: June 14, 2016 | Source:Smart Contract Security
Solidity was started in October 2014 when neither the Ethereum network nor the virtual machine had any real-world testing, the gas costs at that time were even drastically different from what they are now. Furthermore, some of the early design decisions were taken over from Serpent. During the last couple...
Published on: June 10, 2016 | Source:Security Alert - cpp-ethereumβs account unlocking problem not yet fixed [Now fixed]
Affected configurations: cpp-ethereum (eth, AlethZero, β¦) version 1.2.0 up to 1.2.6 Note: Neither βgethβ nor βMistβ nor the βEthereum Walletβ (unless explicitly used together with cpp-ethereum) are affected by this, they lock accounts correctly again. This is just a quick head's up that cpp-ethereum's security issue around account security...
Published on: June 03, 2016 | Source:Go Ethereumβs JIT-EVM
The Ethereum Virtual machine is kind of different than most other Virtual Machines out there. In myprevious postI already explained how itβs used and described some of its characteristics. The Ethereum Virtual Machine (EVM) is a simple but powe...
Published on: June 02, 2016 | Source:Security Alert - cpp-ethereum keeps accounts unlocked
Affected configurations: cpp-ethereum (eth, AlethZero, ...) version 1.2.0 up to 1.2.5 (fixed in 1.2.6) Note: Neither "geth" nor "Mist" nor the "Ethereum Wallet" (unless explicitly used together with cpp-ethereum) are affected by this, they lock accounts correctly again.Severity: HighPossible Attacks:
Published on: May 31, 2016 | Source:Security Alert β Geth suffers from a very low probable DoS attack vector - Update immediately
Affected configurations:AllGo client versions Likelihood:Very low Severity:High Details:A bug in Geth (and potentially other clients) may suffer from a DoS attack and allows remote attackers to stall synchronisation process almost indefinitely by supplying a valid, lighter...
Published on: May 17, 2016 | Source:On Settlement Finality
Special thanks to Tim Swanson for reviewing, and for further discussions on the arguments in his original paper on settlement finality. Recently one of the major disputes in ongoing debate between public blockchain and permissioned blockchain proponents is the issue of settlement finality. One of the simple properties that...
Published on: May 09, 2016 | Source:C++ DEV Update: Announcing Remix
After almost three months into the "reboot" of the C++ team, I would like to give an update about the team itself, what we did and what we plan to do. Team update The so-called C++ team currently consists of PaweΕ Bylica (@chfast), Greg Colvin (@gcolvin), Liana Husikyan...
Published on: May 04, 2016 | Source:Ethereum Foundation and Wanxiang Blockchain Labs announce a blockbuster event combining Devcon2 and the 2nd Global Blockchain Summit in Shanghai, September 19β24, 2016
[Last update: July 5, 2016] The Ethereum Foundation and Wanxiang Blockchain Labs are excited to jointly announce the International Blockchain Week in Shanghai, which will take place at Hyatt on the Bund, September 19β24, 2016. Both Ethereumβs Devcon and Wanxiang Blockchain Labsβ Global Blockchain Summit were sold out last...
Published on: April 05, 2016 | Source:Ethereum Partners with R3CEV on Lizardcoin, Bringing Together the Best of Centralized Finance and Blockchain Technology
The Ethereum Foundation has announced that it will be working with the New York-based banking consortium R3CEV on creating a new blockchain-based cryptocurrency, Lizardcoin, which aims to showcase the benefits of blockchain technology as well as the consortium's ability to bring the technology to institutional clients and the regulation-loving masses...
Published on: April 01, 2016 | Source:Solidity Available in Visual Studio
Consensys and Microsoft have announced that the Ethereum contract programming language Solidity will be available in Microsoft's Visual Studio integrated development environment. ConsenSys and Microsoft collaborated on this integration to enable developers to rapidly build smart contract-based applications for the public Ethereum blockchain, as well as private and consortium blockchain...
Published on: March 30, 2016 | Source:An Open Source Mining Pool Bounty and DEVgrant
Ethereumβs present reliance on Proof of Work (PoW) mining is not ideal, and while we continue to work with gusto towards a Proof of Stake solution (PoS), we have to live with PoW as gracefully as possible (at least until the eventual switch!). Meanwhile, in the interest of overall network...
Published on: March 29, 2016 | Source:Serenity PoC2
After an additional two months of work after the release of the first python proof of concept release of Serenity, I am pleased to announce that Serenity PoC2 is now available. Although the release continues to be far from a testnet-ready client, much less a production-ready one, PoC2 brings with...
Published on: March 05, 2016 | Source:Homestead Release
Update: We've released version 1.3.5 including networking hotfix for homestead 1.3.4. Development of Ethereum started in December 2013 when two developers and a college dropout researcher decided to put theirheads together and develop this amazing piece of technology. We were later
Published on: February 29, 2016 | Source:From Smart Contracts to Courts with not so Smart Judges
Ethereum is often described as a platform for self-enforcing smart contracts. While this is certainly true, this article argues that, especially when more complex systems are involved, it is rather a court with smart lawyers and a judge that is not so smart, or more formally, a judge with restricted...
Published on: February 17, 2016 | Source:BTC Relay included in Ethereum Bounty Program
Following hacking @ DEVCON1, Martin Swende is Nr. 1 on the leaderboard of the Ethereum Bounty Program. The bounty program is ongoing and the last bounty awarded amounted to 5 BTC. The program is open to anyone. With BTC Relay getting ready for launch on Ether...
Published on: February 17, 2016 | Source:Ethereum DEV Update: C++ Roadmap
Although this is my first post in this blog, many people might already know me as the person behind Solidity. I recently took on the lead of the C++ team and would like to share my vision for the future development. Ethereum is a free software project that anyone...
Published on: February 12, 2016 | Source:Cut and try: building a dream
Last month marked the 2 year anniversary of Ethereum's public announcement at The North American Bitcoin Conference in Miami, Florida, USA. Amid much rumour and excitement, a sizeable crowd mobbed the young Vitalik Buterin after his on-stage announcement, questioning the merit and his desire to build such a system. ...
Published on: February 09, 2016 | Source:Privacy on the Blockchain
Blockchains are a powerful technology, as regular readers of the blog already likely agree. They allow for a large number of interactions to be codified and carried out in a way that greatly increases reliability, removes business and political risks associated with the process being managed by a central entity,...
Published on: January 15, 2016 | Source:The last Blog Post
The time is gone, the song is over, Thought I'd something more to say. -- Pink Floyd It is with no small amount of sadness that I must bid ye farewell. Like The Floydβs work, in the time Iβve been involved with Ethereum, Iβve sampled the full gamut of...
Published on: January 11, 2016 | Source:ΓΞVgrants Update and New Funding
If DEVCON1 proved anything in spades, it was certainly the enthusiasm, creativity, and momentum of the Ethereum developer community. Utilizing the never-before-seen potential unleashed by the Ethereum World Computer, our small-but-growing community is not just re-imagining money (or even just re-imagining the Internet)... It is also re-imagining and delivering alternative...
Published on: January 08, 2016 | Source:Ethereum Foundation Internal Update
Now that Ethereum has launched and is rapidly nearing its Homestead phase, over the last few months we at the Ethereum Foundation have finally had the chance to have some breathing room and plan our strategies with a more long-term view. From a development perspective, we have now started in...
Published on: January 07, 2016 | Source:Understanding Serenity, Part 2: Casper
Special thanks to Vlad Zamfir for introducing the idea of by-block consensus and convincing me of its merits, alongside many of the other core ideas of Casper, and to Vlad Zamfir and Greg Meredith for their continued work on the protocol In the last post in this series, we...
Published on: December 28, 2015 | Source:Understanding Serenity, Part I: Abstraction
Special thanks to Gavin Wood for prompting my interest into abstraction improvements, and Martin Becze, Vlad Zamfir and Dominic Williams for ongoing discussions. For a long time we have been public about our plans to continue improving the Ethereum protocol over time and our long development roadmap, learning from...
Published on: December 24, 2015 | Source:Ethereum in practice part 3: how to build your own transparent bank on the blockchain
This is the third and final post on a series on how to use the Ethereum Wallet to create your own autonomous organisations. On the first post we detailed how to create a token, and on the second we shown how to generate a digital democracy controlled by these tokens....
Published on: December 07, 2015 | Source:Ethereum in practice part 2: how to build a better democracy in under a 100 lines of code
This is a second post on a series on how to use the current Ethereum tools to build smart contracts without needing programming experience. Download the latest version of the Ethereum Wallet, read the first part and let's have fun! Creating a token is fun, but what is the...
Published on: December 04, 2015 | Source:Ethereum in practice part 1: how to build your own cryptocurrency without touching a line of code
A lot of things have happened in the past few weeks in the Ethereum ecosystem, so many that it might be hard for a casual observer to understand where we are and what's available out there. So I would like to use my first post here to give you an...
Published on: December 03, 2015 | Source:Applications of Security Deposits and Prediction Markets You Might Not Have Thought About
Special thanks to Vlad Zamfir for his work in developing many of the ideas behind prediction markets for content curation. For the past six years, people have been searching to try to find those elusive applications of blockchain technology that could finally break out into the mainstream. For cryptocurrency,...
Published on: November 24, 2015 | Source:Merkling in Ethereum
Merkle trees are a fundamental part of what makes blockchains tick. Although it is definitely theoretically possible to make a blockchain without Merkle trees, simply by creating giant block headers that directly contain every transaction, doing so poses large scalability challenges that arguably puts the ability to trustlessly use blockchains...
Published on: November 15, 2015 | Source:Stateful Turing-Complete Policies
One of the major security challenges of the internet over the last twenty years has consistently been the rather simple problem of securing user accounts. Right now, users have accounts with hundreds of websites, and dozens of passwords, leading to large numbers of
Published on: November 09, 2015 | Source:Ethereum Dev Update 2015 / Week 44
With DEVCON1 a mere week away, the teams are excited and preparing to share all the great tools and technology the ecosystem has to offer. There will be hundreds of developers and dozens of talks including Nick Szabo, Vitalik Buterin, and Marley Gray from Microsoft. Tickets are limited and we...
Published on: November 02, 2015 | Source:Microsoft to Sponsor Ethereumβs DEVCON1
London, United Kingdom, October 28th - Ethereum is happy to announce that Microsoft will sponsor and attend DΞVCON1, the premier Ethereum developer conference. Marley Gray, Director of Technology Strategy US Financial Services at Microsoft said, "Microsoft is excited to sponsor and attend Ether...
Published on: October 28, 2015 | Source: