Anthropic says Claude found new weaknesses in HAWK and reduced-round AES
ccerrato147 · x · 2026-07-29
Anthropic says Claude Mythos Preview helped researchers find two cryptographic weaknesses: one that significantly weakens HAWK, a post-quantum signature scheme, and another that attacks round-reduced AES.
The company stresses that no deployed systems are affected, there is no break of AES itself, and no standardized post-quantum cryptography has been broken. The main implication is that frontier models can now uncover mathematical flaws in cryptographic schemes, not just implementation bugs.
Related event: Anthropic's Claude Finds Weaknesses in HAWK and Reduced-Round AES(39 posts)→
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