Ethereum Foundation accelerates post-quantum defence with leanVM and PQ signatures

The Ethereum Foundation has made post-quantum (PQ) security a top strategic priority, forming a dedicated Post-Quantum team led by Thomas Coratger to coordinate research, tooling and protocol upgrades. The effort focuses first on the consensus layer — where thousands of validator signatures are aggregated — a high-risk area if future quantum computers break current cryptography. To address scalability and performance limits of PQ signature schemes, the Foundation is developing leanVM, software that compresses many post-quantum approvals into a single on-chain proof. Testnets running PQ signatures are already active. The program includes developer sessions and research prizes to accelerate improvements to hash functions and PQ algorithms. Industry peers are also preparing: Coinbase set up a quantum advisory board and Optimism published a decade roadmap for migrating its Superchain to PQ cryptography. The EF emphasises there is no immediate threat, but accelerating quantum advances require long lead-time engineering to complete upgrades well before quantum attacks become feasible. For traders, the initiative reduces long-term systemic risk to ETH by proactively hardening consensus-layer signatures, while short-term market effects are likely limited to sentiment and narrative around security and upgrade risks.