Bitcoin TLDR

Algorithm Agility for Bitcoin to maintain security in the face of quantum and classic breaks in the signature algorithms

By Ethan Heilman

bitcoin-dev

Involving Matt Corallo, Erik Aronesty+6 others

Original post on February 9, 2026 14:20 UTC

Last reply on February 23, 2026 21:42 UTC

bitcoin-dev

The proposal aims to enhance Bitcoin’s security against quantum and classical threats.
It introduces a dual signature system for agile transition between algorithms.
This system includes infrastructure support and is motivated by Bitcoin's long-term viability.

The limitations of cryptographic agility in Bitcoin

By Pieter Wuille

bitcoin-dev

Involving Light, conduition+6 others

Original post on February 13, 2026 16:20 UTC

Last reply on February 19, 2026 07:22 UTC

bitcoin-dev

Cryptographic agility in Bitcoin was discussed, exploring user-selected encryption methods.
Concerns about consensus and security with new schemes like FancySig were highlighted.
The debate underscores the balance between innovation and stability in cryptocurrency security.

Hourglass V2 Update

By Mike Casey

bitcoin-dev

Involving Isabel Foxen Duke, Alex+3 others

Original post on February 10, 2026 20:47 UTC

Last reply on February 19, 2026 03:26 UTC

bitcoin-dev

The Hourglass proposal was revised to limit Bitcoin spending from P2PK outputs to one per block.
Details of these revisions are accessible on GitHub, highlighting technical adjustments for stability.
Community feedback is sought on the GitHub and Bitcoin development mailing list to refine the proposal further.

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