Ethereum plans to move from BLS signatures to post quantum secure signatures (opens in new tab)

--- title: How Ethereum plans to replace BLS with Post-Quantum signatures - HashCloak description: Learn how Ethereum could replace BLS validator signatures with post-quantum leanSig, covering hash-based keys, Merkle proofs, aggregation, and trade-offs. published: "May 20, 2026, 4:00 PM UTC" --- Back to insights # How Ethereum plans to replace BLS with Post-Quantum signatures Elena Cryptography Engineer May 20, 2026 For many happy years we've built our digital world, including the decen...