Anthropic says Claude found a faster attack on a reduced AES cipher, not real AES

nptacek · x · 2026-07-29

Anthropic says Claude helped researchers find a much faster attack on a deliberately reduced version of AES.

The key point is that the result applies to a toy or simplified cipher, not real AES. A 200–800× speedup on the reduced version does not translate into practical breaks of standard AES, which would still be astronomically hard to crack.

Related event: Anthropic's Claude Mythos Uncovers Flaws in Post-Quantum Crypto and AES(30 posts)→

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