Cryptographer Matthew Green: AI (purportedly) improved AES attacks by 10 bits, public-key crypto most at risk
matthew_d_green · x · 2026-10-09
Cryptographer Matthew Green weighs in on AI and cryptography: public-key schemes live at the lowest security margin we can justify, while symmetric crypto has excess margin (per Shannon). He notes purported 10-bit AES attack improvements generated by Claude when told to "go break something" — irrelevant in practice since best AES attacks remain far from feasible. He argues the concern applies to any cryptanalytic improvement, not just public-key crypto.
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