AnalysisCybersecurityOctober 5, 2026

AI cracks 1809 cipher written by Napoleon's nephew

Read original source →schneier.com

Bruce Schneier reports another historic cipher has fallen to AI, this one from 1809 and written by Napoleon's nephew. It follows Claude Fable 5.1 solving a 370-year-old cipher in forty-four minutes, which Schneier attributes to AI strength at search-and-test problems.

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