# eth2 quick update no. 3

DevFeed: [eth2 quick update no. 3](<https://devfeed.tech/articles/eth2-quick-update-no-3-16867.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2019/11/08/eth2-quick-update-no-3>)

Author: Danny Ryan

Published: 2019-11-08T00:00:00Z

Content type: article

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [Formal verification](<https://devfeed.tech/topics/formal-verification.md>)

Tags: [analysis](<https://devfeed.tech/tags/analysis.md>), [attacks](<https://devfeed.tech/tags/attacks.md>), [audit](<https://devfeed.tech/tags/audit.md>), [consensus](<https://devfeed.tech/tags/consensus.md>), [consensus-algorithm](<https://devfeed.tech/tags/consensus-algorithm.md>), [fork](<https://devfeed.tech/tags/fork.md>), [formal-verification](<https://devfeed.tech/tags/formal-verification.md>), [implementation](<https://devfeed.tech/tags/implementation.md>), [research-development](<https://devfeed.tech/tags/research-development.md>), [update](<https://devfeed.tech/tags/update.md>), [verification](<https://devfeed.tech/tags/verification.md>)

## AI overview

The third eth2 quick update describes strengthened Phase 0 fork-choice defenses following analysis of decoy-flip-flop and bouncing attacks. It also announces challenges.ethereum.org and a Herumi grant for a fast BLS implementation.

## Source excerpt

Welcome to the third installment of eth2 quick update. tldr; Harden fork choice defences in response to audits Introducing challenges.ethereum.org Herumi grant for a super-fast BLS implementation...