Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun cryptography a method of
encryption by which units ofplaintext are substituted with ciphertext according to a regular system; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing an inverse substitution.
Etymologies
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Examples
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whichbe commented on the word substitution cipher
Secret writing, where the letters of the text are replaced by substitute letters, without transposing them. (from WordCraft)
May 21, 2008