GPT-6 Astra Solves a WWI German Radio Cipher

Automated excerpt

For example, in this text, “AA” corresponds to the letter H, “AD” corresponds to the letter O, “DA” corresponds to the letter B, and so on. This also means that we have 18 columns with 9 symbols each and 1 column with 8 symbols (column “G”). Similarly, the next letter, “R”, corresponds to the letter “V” (because R is the 13th letter alphabetically and thus has 11×9 + 1×8 = 107 symbols before it; the 108th symbol in the message is “V”). In the table above, “AV” corresponds to “E”, the first letter in “EIN”.

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