This is a result of Sanborn’s revelation of “Berlin” as the deciphered plaintext of NYPVTT in Kryptos’ K4.  Where possible, I will cite or repost methods for using known plaintext to attempt a solution of some of the classic ciphers.  Monosyllabic substitution ciphers will not be attempted because T could not simultaneously be I and N in such a cipher.

Known-Plaintext Attack on a Bifid cipher for K4.

Known-Plaintext Attack on a Hill cipher for K4

Kryptosfan

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