VITALIK ON AI-ACCELERATED CRYPTOGRAPHY: HASH-BASED OVER LATTICES

Summary from the TLDR Crypto newsletter

Vitalik Buterin warns that AI-accelerated mathematical research may erode the security of lattice-based cryptography (ML-DSA, LWE, and FHE) through the same mechanism that GNFS degraded RSA, where decades of optimization shrunk effective key strength by an order of magnitude, and projects that AI could compress 50 years of math progress into two years. Ethereum's lean roadmap has already pivoted to hash-only signatures (WOTS and SPHINCS+), dropping lattices, ML-DSA, Falcon, and lattice-based commitments from ZK proofs. Public-key encryption cannot be constructed from hashes alone due to long-standing mathematical constraints, which means secure messaging, VPNs, and anonymizing protocols face an open problem that extends well beyond blockchains. Buterin's practical recommendations include keeping funds in addresses that have not yet broadcast transactions, moving multisig confirmations offchain to avoid exposing signer public keys, and routing encrypted notes through offchain channels rather than publishing them onchain.