Ethereum Foundation researcher Justin Drake announced at Devcon 8 that Ethereum's post-quantum security roadmap is accelerated by about a year, from its December 2029 target to December 2028

Whether quantum computers could break the cryptography securing Bitcoin and other blockchains, and how networks plan to migrate before that day.

The Ethereum Foundation's Protocol Cluster set a December 2029 quantum-security target in its September 7, 2026 priorities update. Its plan prioritizes changes across execution, consensus and data while acknowledging uncertainty about when a capable quantum computer might exist.