The Ethereum Virtual machine is kind of different than most other Virtual Machines out there. In my previous post I already explained how it’s used and described some of its characteristics. The Ethereum Virtual Machine (EVM) is a simple but powerful, Turing complete 256bit Virtual Machine that allows anyone to execute arbitrary EVM Byte Code. The go-ethereum project

Affected configurations: cpp-ethereum (eth, AlethZero, …) version 1.2.0 up to 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. This is just a quick head’s up that cpp-ethereum’s security issue around account security is not yet properly fixed. The

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 of months, examples and patterns

London, United Kingdom, June 14, 2016 – 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 comprehensive Ethereum-focused developer’s conference to date.

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, where an attacker called the “split” function, and then calls the split function recursively inside of the split,

Over the last day with the community’s help we have crowdsourced a list 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) is as follows: We can categorize

Affected configurations: All smart contract wallets created using Ethereum Wallet  Frontier, version 0.4.0 (Beta 7) or earlier. Wallets created with Ethereum Wallet 0.5.0 and all later versions released after March 3, 2016, are not affected. Likelihood: Low Severity: High Summary: Do not use wallet contracts or owner accounts of those wallets that were created by

The last week was quite hectic for all of us in the Ethereum ecosystem. The DAO has shown us that it takes much more effort to write smart contracts than we originally anticipated; but also that it takes a surprising amount of debate to reach a consensus on issues of this scale. Everybody in our community was very

Affected configurations: geth 1.4.8 Likelihood: High Severity: High Details: An attack vector has been identified in the freshly released implementation of the DAO soft fork. The fork enactment code in geth (and other clients) allows execution of EVM code up to the block gas limit without paying for gas. This can slow down mining and prevent inclusion of

The Devcon2 web site is officially live now! You can find it at https://ethereumfoundation.org/devcon/ Thanks for everyone’s interest, proposals, support and enthusiasm. We have an amazing community and are excited to present the first Ethereum Foundation event in Asia. This year, Devcon2 (September 19, 20, 21) will be a featured conference at the International Blockchain Week in Shanghai