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OpenAI GPT–6 Astra breaks Enigma message that has resisted solution since 2005

738 points · 448 comments · sohkamyung

gcr · 1790163680 · focus · HN ↗
Silly question: how do we know that the decrypted message is correct?
Isn’t it feasible that a given ciphertext could mean any number of different things under different settings? If so, we don’t know whether this setting happens to match a plausible plaintext or whether this really was the plaintext the sender intended to send.
1. Koshkin · 1790164293 · focus · HN ↗
  Is it even possible for the same cyphertext to encode different messages using different keys?
  1. krapp · 1790165320 · focus · HN ↗
    According to the cryptography Stack Exchange, yes: <a href="https://crypto.stackexchange.com/questions/64757/is-it-possible-to-get-different-plaintexts-from-a-single-ciphertext-using-differ" rel="nofollow">https://crypto.stackexchange.com/questions/64757/is-it-possi...
    But I don't think this describes intentionally encoding a different message, rather that different messages are hypothetically possible based on different keys but only one is intentional.
    It might be feasible to encode different messages using different ciphers, like one in the text, another using steganography on the decrypted text. IDK. I'm not a cryptographer.

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