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The National Cipher Challenge

Reply To: Challenge 8B – Hints

#98803
Cypher1_HGS
Participant

I feel that this is a polybius cipher, but solving the ciphertext using a polybius cipher directly gives some gibberish which no matter what I do doesn’t give useful output, whether I use a shift or a polyaphabetic cipher afterwards. As such I have a feeling that the ciphertext is first changed slightly and then solved using a polybius, but I’m not entirely sure how.

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