QUANTUM RESISTANCE ROADMAP FOR ETHEREUM

Summary from the TLDR Crypto newsletter

Vitalik Buterin has published a comprehensive quantum resistance roadmap addressing four attack surfaces — consensus-layer BLS signatures, data availability, EOA signatures, and application-layer ZK proofs — with distinct cryptographic migration paths for each. The most acute challenge is at the ZK layer, where quantum-resistant STARKs carry ~10M gas cost versus 300-500K for current SNARKs. The unifying solution is protocol-layer recursive aggregation via EIP-8141 validation frames, in which a single STARK per block could replace 3-256MB of per-transaction signatures and proofs, with proving delegated to the mempool layer at roughly 500ms intervals. A significant open question remains the selection of Ethereum's long-term hash function — candidates include Poseidon2 with extra rounds, Poseidon1, and BLAKE3.