GPT-6 Astra 破解 217 年前的拿破仑军事密信

Sloth Reports @slothreports原推发布于 2026.10.01

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GPT-6 Astra cracked a 217-year-old Napoleonic military cipher. The encrypted letter dates to March 1809 and was sent to Napoleon’s marshal Auguste de Marmont, shortly before Austria invaded France’s sphere of influence. Astra reportedly analyzed the 1,300-symbol ciphertext, reconstructed the missing key from historical material and used simulated annealing to solve it. The decoded message contains military intelligence on troop positions and Austrian movements. Cryptographer Satoshi Tomokiyo reviewed the solution and marked the previously unsolved cipher as solved, although five symbols remain uncertain.