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GPT-6 Astra Solves a WWI German Radio Cipher

400 points · 180 comments · nsoonhui

  1. adverbly · · focus · HN ↗
    I'm no crypto expert at all but isn't TRUPPENVERSCHIEBUNG an actual word?

    Google says it translates to "troops shift"

    If so, I don't understand how this was difficult at all... Can't you just do a dictionary attack and then check if the resulting phrase forms a sentence?

    I don't understand how this couldn't be done by someone in their house with access to a computer and a German dictionary.

    Maybe I'm messing something? Was the rearranging of the letters random in some non-deterministic way that wasn't known up front?

    1. unreal37 · · focus · HN ↗
      Also the letters of the word were rearranged to alphabetical order. And duplicate letters were removed.

      So it's not just a dictionary attack. It's that plus modifying the word before using it.

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