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  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 I...

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 b...

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 releas...

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 thu...

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 forthc...

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 di...

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 de...

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 ...

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 w...

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,...

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...

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 descri...

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. pr...

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 s...

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....

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 propertie...

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. ...

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 p...

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 (10-100...

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, ...

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 us...

As I'm writing this, I’m sitting in the London office and pondering how to give you a good overview about the work we’ve been doing to secure Ethereum’s protocols, clients and p2p-network. As you might remember, I joined the Ethereum team at the end of...

Special thanks to Gavin Wood, Vlad Zamfir, our security auditors and others for some of the thoughts that led to the conclusions described in this post One of Ethereum's goals from the start, and arguably its entire raison d'être, is the high degree o...

One of the important issues that has been brought up over the course of the Olympic stress-net release is the large amount of data that clients are required to store; over little more than three months of operation, and particularly during the last mon...

When I started evangelizing bitcoin and blockchain tech back in 2012 my Dad was a hard sell. There was the common skepticism and typical counters of “what’s backing it?”, “what can be done with it?” and “what the heck is cryptography?" Back then my pit...

Been a while, I know, but then these are rather busy days. I'm writing this from a Starbucks in Shanghai sitting behind the Great Firewall, able to peep out only occasionally. I've been in Asia with Marek for the last couple of weeks, mainly for meetu...

One of the interesting problems in designing effective blockchain technologies is, how can we ensure that the systems remain censorship-proof? Although lots of work has been done in cryptoeconomics in order to ensure that blockchains continue pumping o...

Special thanks to Vitalik Buterin, Gavin Wood and Jeffrey Wilcke for countless revisions feedback, picks at their brains, and helping me read their tea leaves....

As part of our drive to introduce Ethereum to the far corners of the world, not to mention demonstrate the potential for embedded blockchain technology (even without light-nodes) I'm happy to announce the roll-out of our "eπ" Ethereum-on-Raspberry Pi p...

What began all the way back on midnight of February 1st 2014, is coming to a close: we are happy to announce the release of the ninth and last in the Ethereum Proof-of-Concept series. We invite the community to participate in the ongoing Proof-of-Conc...