一张图加部分密钥，Astra 自建求解器破1809年密文

nordin.eth @nordin_eth原推发布于 2026.10.01

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Someone in 1809 really wrote a military message in cipher thinking this thing was staying secret forever. 217 years later GPT-6 Astra gets one image, a partial key and 1,300 handwritten symbols… then starts working backwards and builds its own solver to crack the whole thing. Two centuries of secrecy cooked by one prompt.