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Schneier on Security
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Claude Fable Solves a Historical Cipher Claude Fable 5.1 solved a 370-year-old cipher in forty-four minutes. This tracks with what I wrote about AIs doing mathematics: It's good at things that involve lots… https://www.schneier.com/blog/archives/2026/09/claude-fable-solves-a-historical-cipher.html

schneier.comClaude Fable Solves a Historical CipherClaude Fable 5.1 solved a 370-year-old cipher in forty-four minutes. This tracks with what I wrote about AIs doing mathematics: It's good at things that involve lots of searching and testing.

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