# Ethereum Proof-of-Stake Attacks and Proposed Mitigations Before the Merge

DevFeed: [Ethereum Proof-of-Stake Attacks and Proposed Mitigations Before the Merge](<https://devfeed.tech/articles/finalized-no-31-16985.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2021/11/02/finalized-no-31>)

Author: Danny Ryan

Published: 2021-11-02T00:00:00Z

Content type: opinion

Language: en

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

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [Security](<https://devfeed.tech/topics/security.md>), [Algorithms](<https://devfeed.tech/topics/algorithms.md>)

Tags: [algorithm](<https://devfeed.tech/tags/algorithm.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [research-development](<https://devfeed.tech/tags/research-development.md>), [security](<https://devfeed.tech/tags/security.md>)

## AI overview

The article contextualizes a paper describing three possible attacks on Ethereum's proof-of-stake algorithm, including liveness and reorganization attacks on the beacon chain. It says the issues are serious but have technically simple, formally analyzed mitigations, including proposer boosting and proposer view synchronization, and that a fix is expected before the Merge without delaying its timeline.

## Source excerpt

This issue of Finalized is dedicated to the contextualization of a recently published paper describing three possible attacks on Ethereum's proof-of-stake algorithm. tl;dr These are serious attacks with a formally-analyzed, technically-simple mitigation. A fix will be rolled out prior to the Merge and will not delay Merge timelines....