Overview
HAWK is a lattice-based post-quantum digital signature candidate (module Lattice Isomorphism Problem) that advanced in NIST’s Additional Digital Signatures process. It is related to but distinct from Falcon; attacks on HAWK do not automatically transfer to Falcon.
Recent Developments
- 2026-07-28: claude-mythos Preview (Anthropic Frontier Red Team) found a nontrivial lattice automorphism improving key recovery — roughly halving effective key strength; ~60 hours / ~$100K API cost; coordinated disclosure with HAWK authors and NIST (2026-07-30-anthropic-mythos-hawk-aes-cryptanalysis)
- Expert view (matthew-green): scheme not deployed; still exponential-time attack; doubling keys may erase efficiency rationale (2026-07-30-anthropic-mythos-green-crypto)
Does not break production deployed systems; does not transfer to Falcon or all lattice crypto.