# Ethereum EIP-8450 Draft Proposes Post-Quantum Key Registry By Simon Yoon Canonical URL: https://www.tokenpost.com/news/technology/43153 Published: 2026-10-29T04:11:00.000Z Updated: 2026-10-29T04:11:00.000Z Section: Technology > The design uses hash-based cryptography, including leanXMSS keys and VRF tree roots. Replacing a key would take at least one epoch and include replay protection. Ethereum’s EIP-8450 proposes a post-quantum public-key registry for validators, outlining how keys could be registered and replaced; the proposal remains a draft and has not been deployed. The design uses hash-based cryptography, including leanXMSS keys and VRF tree roots. An update to the [draft registry described in earlier TokenPost coverage]() specifies that a validator’s BLS signing key authorizes registration and replacement of post-quantum keys. Replacing a key would be delayed by at least one epoch, and the proposal includes replay protection. The update was timestamped 12:02 a.m. ET Thursday (04:02 UTC) Oct. 29. ## Links in this article - [draft registry described in earlier TokenPost coverage](https://www.tokenpost.com/news/technology/38748)