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  • https://math.libretexts.org/Bookshelves/Applied_Mathematics/Math_in_Society_(Lippman)/16%3A_Cryptography/16.04%3A_Advanced_shared_symmetric-key_methods
    Notice that frequency analysis is much less useful now, since the character E has been mapped to three different characters due to the shifting of the substitution mapping. Decrypt the message KIQRV i...Notice that frequency analysis is much less useful now, since the character E has been mapped to three different characters due to the shifting of the substitution mapping. Decrypt the message KIQRV if it was encrypted using a basic Caesar cipher with shift 3 as the initial substitution, but shifting the substitution one place after each character. The specific wheels used, order of the wheels, and starting position of the wheels formed the encryption key.
  • https://math.libretexts.org/Courses/Las_Positas_College/Math_for_Liberal_Arts/06%3A_Cryptography/6.04%3A_Advanced_shared_symmetric-key_methods
    Notice that frequency analysis is much less useful now, since the character E has been mapped to three different characters due to the shifting of the substitution mapping. Decrypt the message KIQRV i...Notice that frequency analysis is much less useful now, since the character E has been mapped to three different characters due to the shifting of the substitution mapping. Decrypt the message KIQRV if it was encrypted using a basic Caesar cipher with shift 3 as the initial substitution, but shifting the substitution one place after each character. The specific wheels used, order of the wheels, and starting position of the wheels formed the encryption key.

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