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monoalphabetic substitution
[ mon-oh-al-fuh-bet-ik suhb-sti-too-shuhn, mon-oh- ]
noun
, Cryptography.
- a system of substitution that uses only one cipher alphabet in a cryptogram so that each plaintext letter is always represented by the same cipher.
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Word History and Origins
Origin of monoalphabetic substitution1
1935–40; mono- + alphabetic ( def )
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