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Development has steadily continued over the last month and a half as we approach the launch of Metropolis. Over a series of core dev calls over the last few months, we have specified and finalized the EIPs for...

The Foundation believes Encrypted Media Extensions (EME) should not be published as a W3C Recommendation, and we are now making public the formal objection the Ethereum Foundation submitted to the W3C opposing the recommendation of EME. As a member of...

Thanks to all the developers and team leads who contributed to the sections on their projects In the last month and a half, the Ethereum network went through a rapid growth in usage, to the point that it now processes as many transactions per second a...

Over the last month and a half we saw vigorous ongoing research and development on all sides of the Ethereum roadmap, and progress is rapidly starting to translate into real results that can be run and verified inside of an Ethereum client. On Metropo...

A bug in the Solidity optimizer was reported through the Ethereum Foundation Bounty program, by Christoph Jentzsch. This bug is patched as of 2017-05-03, with the release of Solidity 0.4.11....

Cramming in a lot more goodies than originally anticipated, the Go Ethereum team is proud to finally deliver the first incarnation of the 1.6 Geth release series! Glimpsing through the commit list, this is going to be a monster post!...

The last one and a half months have seen great progress for Ethereum research, and we are excited that the protocol is moving closer and closer to the point where it is ready for mainstream adoption. Progress on consensus algorithms, privacy, zero know...

The last one and a half months have seen great progress for Ethereum research, and we are excited that the protocol is moving closer and closer to the point where it is ready for mainstream adoption. Progress on consensus algorithms, privacy, zero know...

It's been a fairly busy for the last couple of months for the Ethereum javascripters. To start with, there was a really great hackathon with IPFS. You can read Dan Finlay's excellent write up here. Also, during this time Aaron Davis (Kumavis) made s...

During the last month and a half, the Ethereum core development and research teams have been building upon the progress made in the last year, and with the specter of last year's security issues now well behind us, work has begun in full force on imple...

Members of the Ethereum R&D team and the Zcash Company are collaborating on a research project addressing the combination of programmability and privacy in blockchains. This joint post is being concurrently posted on the Zcash blog, and is coauthor...

The first version of the Light Ethereum Subprotocol (LES/1) and its implementation in Geth are still in an experimental stage, but they are expected to reach a more mature state in a few months where the basic functions will perform reliably. The light...

December marks a month of continued progress in the Ethereum ecosystem. Research on proof of stake and sharding continues after the research team's workshop in Singapore in November, the light client slowly keeps getting better, Whisper and Swarm keep ...

On December 16, we were made aware that someone had recently gained unauthorized access to a database from forum.ethereum.org. We immediately launched a thorough investigation to determine the origin, nature, and scope of this incident. Here is what we...

With the long awaited geth 1.5 ("let there bee light") release, Swarm made it into the official go-ethereum release as an experimental feature. The current version of the code is POC 0.2 RC5 -- "embrace your daemons" (roadmap), which is the refactored ...

This chapter describes the game theory and economic security modelling we were doing in the Fall of 2014. It recounts how the "bribing attacker model" led our research directly to a radical solution to the long range attack problem....

Vitalik suggested last week that I share my basic research and design philosophy in a blog post, I agreed but complained that it was still changing. My friend Jon West told me that everyone would really appreciate it if I told everyone about my Casper ...

The possibilities of zkSNARKs are impressive, you can verify the correctness of computations without having to execute them and you will not even learn what was executed - just that it was done correctly. Unfortunately, most explanations of zkSNARKs re...

This week marks the completion of our fourth hard fork, Spurious Dragon, and the subsequent state clearing process, the final steps in the two-hard-fork solution to the recent Ethereum denial of service attacks that slowed down the network in September...

Security Alert Affected configurations: Geth Severity: High Summary:  An issue has been identified with Geth's journaling mechanism. This caused a network fork at block #2686351 (Nov-24-2016 14:12:07 UTC). The...

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The Ethereum network will be undergoing a hard fork at block number 2,675,000, which will likely occur between 15:00 and 16:00 UTC on Tuesday, November 22, 2016. A countdown timer can be seen at https://fork.codetract.io/. The Morden test network will ...

The Go Ethereum team is very proud to finally release Geth 1.5, which can almost be called a complete internal rewrite of the Go Ethereum (go-ethereum) codebase. We've packed a huge number of changes into this release, and simply listing them wouldn't...

This blog post provides an update on our findings following the discovery of the storage corruption bug last week. In summary, the bug was much less severe than we initially thought. The small number of affected contracts we found is either only exploi...

Summary: In some situations, variables can overwrite other variables in storage. Affected Solidity compiler versions: 0.1.6 to 0.4.3 (including 0.4.4 pre-release versions) Detailed description: Storage variables that are smaller than 256 bits are pa...

One of the important indicators of how much load the Ethereum blockchain can safely handle is how the uncle rate responds to the gas usage of a transaction. In all blockchains of the Satoshian proof-of-work variety, any block that is published has the ...

Mist leaks some low level APIs, which Dapps could use to gain access to the computer's file system and read/delete files. This would only affect you if you navigate to an untrusted Dapp that knows about these vulnerabilities and specifically tries to a...

The Ethereum network will be undergoing a hard fork at block number 2463000, which will likely occur between 12:00 and 13:00 UTC on Tuesday, October 18, 2016. A countdown timer can be seen at https://fork.codetract.io/....

During the last couple of weeks, the Ethereum network has been the target of a sustained attack. The attacker(s) have been very crafty in locating vulnerabilities in the client implementations as well as the protocol specification. While the recent pa...

Today the network was attacked by a transaction spam attack that repeatedly called the EXTCODESIZE opcode (see trace sample here), thereby creating blocks that take up to 20-60 seconds to validate due to the 50,000 disk fetches needed to process the tr...