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In cryptology, a code is a method used to encrypt a message that operates at the level of meaning; that is, words or phrases are converted into something else. A code might transform "change" into "CVGDK" or "cocktail lounge". The U.S. National Security Agency defined a code as "A substitution cryptosystem in which the plaintext elements are primarily…
One-time code, Cryptanalysis of codes & Idiot code
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code codes message messages ciphers used example plaintext cipher codebook groups letters cryptanalysis codebooks abc codegroups words might would individual
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