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An Update on Integrating Zcash on Ethereum (ZoE)

Posted on January 19th, 2017.

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 coauthored by Ariel Gabizon (Zcash) and Christian Reitwiessner (Ethereum). Ethereum’s flexible smart contract interface enables a large variety […]

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DApps

Introduction of the Light Client for DApp developers

Posted on January 7th, 2017.

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 client has been designed to function more or less the same as a […]

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the project

December Roundup

Posted on December 31st, 2016.

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 moving forward, and discussions on protocol economics and community governance continue to mature. First, privacy technologies on Ethereum, […]

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Security

Security alert [12/19/2016]: Ethereum.org Forums Database Compromised

Posted on December 19th, 2016.

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 know: The information that was recently accessed is a database backup from April 2016 and contained […]

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announcement

Swarm alpha public pilot and the basics of Swarm

Posted on December 15th, 2016.

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 and cleaner version of the codebase that was running on the Swarm toynet […]

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technical

The History of Casper – Chapter 2

Posted on December 7th, 2016.

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. Chapter 2: The Bribing Attacker, Economic Security, and the Long Range Attack Problem Vitalik and I […]

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technical

The History of Casper — Chapter 1

Posted on December 6th, 2016.

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 research, I mostly agreed. Then someone on reddit told me […]

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Uncategorized

zkSNARKs in a nutshell

Posted on December 5th, 2016.

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 resort to hand-waving at some point and thus they remain something “magical”, suggesting that only the […]

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dev update

Ethereum Research Update

Posted on December 4th, 2016.

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 and October. Gas limits are in the process of being increased to 4 million as the network […]

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release

Security alert [11/24/2016]: Consensus bug in geth v1.4.19 and v1.5.2

Posted on November 25th, 2016.

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 new Geth release 1.5.3 fixes the journaling issue and repairs the fork. Details: Geth was failing to revert empty account deletions when the transaction causing the […]