# Finalized No. 25: Rayonism, blst Security Advisory, and Beacon Chain Security RfP

DevFeed: [Finalized No. 25: Rayonism, blst Security Advisory, and Beacon Chain Security RfP](<https://devfeed.tech/articles/finalized-no-25-16957.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2021/04/02/finalized-no-25>)

Author: Danny Ryan

Published: 2021-04-02T00:00:00Z

Content type: news

Language: en

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

Topics: [Security](<https://devfeed.tech/topics/security.md>), [Development](<https://devfeed.tech/topics/development.md>), [Fuzzing/Fuzz testing](<https://devfeed.tech/topics/fuzzing.md>), [Testing](<https://devfeed.tech/topics/testing.md>), [migration](<https://devfeed.tech/topics/migration.md>), [Formal verification](<https://devfeed.tech/topics/formal-verification.md>)

Tags: [discord](<https://devfeed.tech/tags/discord.md>), [formal-verification](<https://devfeed.tech/tags/formal-verification.md>), [fuzzing](<https://devfeed.tech/tags/fuzzing.md>), [migration](<https://devfeed.tech/tags/migration.md>), [pos](<https://devfeed.tech/tags/pos.md>), [pow](<https://devfeed.tech/tags/pow.md>), [research-development](<https://devfeed.tech/tags/research-development.md>), [security](<https://devfeed.tech/tags/security.md>), [testing](<https://devfeed.tech/tags/testing.md>)

## AI overview

This Ethereum Foundation update covers Rayonism Merge devnets, a patched security issue in the blst BLS library, and a request for proposals on Beacon Chain security and testing.

## Source excerpt

tl;dr Rayonism☀, hacking the Merge together blst security advisory Reminder! Beacon Chain security+testing RfP...