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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
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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...
Microsoft to Sponsor Ethereum’s 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...
Nick Szabo Confirmed as Keynote Speaker of Ethereum’s DEVCON1
London, United Kingdom, October 22nd - The Ethereum Foundation is pleased to announce the Keynote Speaker of Ethereum’s annual conference DΞVCON1, Nick Szabo. Nick’s keynote will focus on the history of the blockchain, smart contracts and assets on the blockchain. Nick is a computer scientist, legal scholar and cryptographer known...
Security alert [Implementation of BLOCKHASH instruction in C++ and Go clients can potentially cause consensus issue – Fixed. Please update.]
Summary: Erroneous implementation of BLOCKHASH can trigger a chain reorganisation leading to consensus problems Affected configurations: All geth versions up to 1.1.3 and 1.2.2. All eth versions prior to 1.0.0. Likelihood: Low Severity: Medium Impact: Medium Details: Both C++ (eth) and Go (geth) clients have...
Vitalik’s Research and Ecosystem Update
Over the last five days, myself, our executive director Ming Chan, and several others from the Ethereum team and Ethereum-based projects and businesses including Maker, String/Dfinity and Consensys have been visiting China and Hong Kong, where there have been a series of back-to-back conferences and events most notably including the...
Ethereum Dev Update 2015 / Week 41
In an effort to bring the community more information about the going-ons at Ethereum, we're planning to release semi-weekly updates of project progress. Ihope this provides some high-level information without havingto live onGitHub ;) The Go and C++ teams have daily standups and are making regular progress along with...
Security Advisory [eth (cpp-ethereum) potentially vulnerable if running with UPnP enabled]
Affected configurations: Issue reported for eth (cpp-ethereum).Likelihood: Medium
The Evolution of Ethereum
Many of you know that the Ethereum platform grew out of the realization that blockchains can go far beyond currency, together with a frustration with the limitations of previous projects. The core idea was simple: a blockchain with a built-in Turing-complete programming language, allowing users to build any kind of...
More uncle statistics
The following are some interesting results on the performance of different miners over the course of the first 280,000 blocks of the Ethereum blockchain. For this timespan I have collected the list of block and uncle coinbase addresses; raw data can be found here for blocks and here for uncles,...
DEVcon is back!
DevCon 1 will be happening in London on November 9-13, a little over one hundred days since the Ethereum network launched. Over the last months, we’ve seen the network grow from a few hundred nodes starting on that one exciting and special night to a very substantial, globally deployed stable...
Ethereum Comms Announcement
The foundation is currently in the phase of restructuring its communications activities. Several members of our current communications team in London are soon leaving or reducing their involvement in the Foundation in order to pursue for-profit ventures on top of the Ethereum ecosystem; we wish them the best of luck....
Ethereum Wallet - Developer Preview
We are happy to announce our very first developer-preview of the Ethereum Wallet ÐApp. The point of this release is to gather feedback, squash bugs and, most importantly, get the code audited. Please note that this is a developer-preview and not the final release. We advise you to be...
On Slow and Fast Block Times
One of the largest sources of confusion in the question of blockchain security is the precise effect of the block time. If one blockchain has a block time of 10 minutes, and the other has an estimated block time of 17 seconds, then what exactly does that mean? What is...
Security Alert – [Previous security patch can lead to invalid state root on Go clients with a specific transaction sequence – Fixed. Please update.]
Summary: Implementation bug in the go client may lead to invalid state Affected client versions: Latest (unpatched) versions of Go client; v1.1.2, v1.0.4 tags and develop, master branches before September 9. Likelihood: Low Severity: High Impact: High Details: Go ethereum client does not...
A message from Stephan Tual
To the wonderful Ethereum Community, You often heard me say at conferences that Ethereum was not a company, a foundation, an implementation, or an individual. Ethereum is both an idea and an ideal, encompassing the first censorship-resistant network build specifically to enable those who need it the most to...
Security Alert – [Implementation bug in Go clients causing increase in difficulty – Fixed – Miners check and update Go clients]
Implementation bug in the go client leads to steady increase of difficulty independent of hashing power. Affected configurations: All Go client versions v1.0.x, v1.1.x, release and develop branches. The bug was introduced in a recent update and release through commit h...
Security Advisory [Implementation bugs in Go and Python clients can cause DoS – Fixed – Please update clients]
State transition and consensus issue in geth client causes panic (crash) when processing a (valid) block with a specific combination of transactions, which may cause overall network instability if block is accepted and relayed by unaffected clients thus causing a DoS. This may happen in a block that contains transactions...
devcon one postponed until further notice
Unfortunately we were not able to secure the venue for devcon one in London on the dates desired (October 5th-8th). As a consequence we are postponing the event until further notice. Please do not make travel plans at this time. Updates will be forthcoming on the devcon one website ....
Security Advisory [Insecurely configured geth can make funds remotely accessible]
Insecurely configured Ethereum clients with no firewall and unlocked accounts can lead to funds being accessed remotely by attackers. Affected configurations: Issue reported for Geth, though all implementations incl. C++ and Python can in principle display this behavior if used insecurely; only for nodes which leave the JSON-RPC port...
On Anti-Pre-Revelation Games
An increasing number of proposed applications on top of Ethereum rely on some kind of incentivized, multi-party data provision - whether voting, random number collection, or other use cases where getting information from multiple parties to increase decentralization is highly desirable, but also where there is a strong risk of...
Olympic Rewards Announced
ETH DEV would like to thank everyone for their participation in the Olympic test network, which helped us greatly in stress testing, optimization, and finding bugs in the Ethereum clients, as well as determining what the limits of the current Ethereum system are. To that end, we are pleased to...
Security alert [consensus issue]
This alert is related to a consensus issue that occurred on the Frontier network at block 116,522, mined on 2015-08-20 at 14:59:16+02:00 – Issue has been fixed, see "Fix" below. Impact:High Issue description: State database consensus issue in geth with deletion of account data, which could happen during...
An Analysis of the First 100000 Blocks
After a successful launch, Frontier passed it's 100000th block earlier this week. Here are some interesting stats from these first blocks. The first 50 block times (in seconds): Right after genesis, it took 29 seconds for the second block to appear, then 31 and 29 seconds for...
Chain Reorganisation Depth Expectations
This following shows our current and planned expectations concerning maximum likely chain-reorganisation depth. We would not consider transactions within this depth to have an exceptionally high chance of being permanent. These are our own expectations only and do not constitute any sort of guarantee. They are derived from theoretical considerations,...
Security Alert 1 [windows+alethzero]
This affects users of Alethzero GUI client on Windows. Users of eth CLI client or not on the Windows platform are unlikely to be affected but should take action detailed below.Users of Frontier command line interface geth are unaffected. Issue description: While setting privacy permissions on the keys directory,...
On Public and Private Blockchains
Over the last year the concept of "private blockchains" has become very popular in the broader blockchain technology discussion. Essentially, instead of having a fully public and uncontrolled network and state machine secured by cryptoeconomics (eg. proof of work, proof of stake), it is also possible to create a system...
Ethereum Protocol Update 1
Here comes the first Frontier patch, and this is a big one! Before you go further, if your keys date back from Go 1.0 rc or C++ 0.9.36, note that you should regenerate all of your keys NOW. Though some releases of the pre-alpha and alpha clients are secure,...
The Thawing Frontier
After a smooth launch, please find a few updates of note below. These probably will be of interest only to the more advanced users amongst you - if you’re not a miner, there is nothing to action....
Introducing Casper “the Friendly Ghost”
Hi everyone – Vlad here. I’ve been working on the analysis and specification of “proof-of-stake” blockchain architecture since September 2014. While Vitalik and I haven’t agreed on all of the details of the spec, we do have consensus on many properties of the proof-of-stake protocol that will likely be implemented...
Announcing the New Foundation Board and Executive Director
After an intensive recruitment period, the Ethereum Foundation has selected an Executive Director and named three members to the Board of Directors. This is a new organizational structure, which will allow us to focus on our next phase of development. The Ethereum Foundation is a not for profit (‘Stiftung’)...
Ethereum Launches
A few minutes ago, many of you generated and loaded the Ethereum Genesis block, marking the inception of Frontier, the first Live release of the Ethereum project. The Dev team joins me in thanking each and everyone of you for your support during the past year and half. It’s...
A few last minute notes…
Genesis is roughly 4 hours away, here are a few last minute pointers for those preparing: All clients are functional on all platforms and build to completion: http://ethereum-buildboard.meteor.com/ Please note that it will take a little while (10-1000 blocks) before the network stabilises. This is a marathon, not...
Final Steps
An update as promised: all systems are now ‘Go’ on the technical side (pun intended) and we intend to release Frontier this week. Thank you to everyone who provided feedback on my previous blog post. What became apparent is that prior to the big day, many of you wanted...
Frontier is coming - what to expect, and how to prepare
We are only days away from launching 'Frontier', the first milestone in the release of the Ethereum project. Frontier will be followed by 'Homestead', 'Metropolis' and 'Serenity' throughout the coming year, each adding new features and improving the user friendliness and security of the platform....