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I'm currently trying to crack a ciphertext with three rotating substitution ciphers. I've tried dividing the cipher up into three parts and do text frequency analysis since I know the language but no luck when trying to peace together the parts. It keeps coming back as gibbirish.

Are there any tips or tool that you would suggest?

  • Can you just bruteforce it? – meshcollider Jan 25 '22 at 04:17
  • Brute Force and text frequency analysis are good for monoalphabetic substitution. In general they may not be useful for polyalphabetic ciphers. I don't know your cipher, but maybe the Kasiski-test is a good starting point. Another idea is finding the key length. – Titanlord Jan 25 '22 at 12:24

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