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substitution cipher
(redirected from Substitution ciphers)

   Also found in: Wikipedia 0.01 sec.
substitution cipher [‚səb·stə′tü·shən ‚sī·fər]
(communications)
A cipher in which the characters of the original message are replaced by other characters according to a key.


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The author begins a description of various symmetric-key cryptographic algorithms that includes basic substitution ciphers, cryptanalysis and other encryption standards.
Readers will no doubt invent still more substitution ciphers to use instead of those which I have considered, thus further increasing the scope of transformations allowed from word to word.
One of the early substitution ciphers is credited to Julius Caesar.
 
 
 
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