polyalphabetic substitution

[pol-ee-al-fuh-bet-ik, pol-ee-]

pol·y·al·pha·bet·ic substitu·tion

[pol-ee-al-fuh-bet-ik, pol-ee-]
noun Cryptography.
a system of substitution that mixes together a number of cipher alphabets in a cryptogram so that each plaintext letter is represented by a cipher that repeatedly changes.


Origin:
1935–40; poly- + alphabetic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To polyalphabetic substitution

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Polyalphabetic substitution has a plethora of syllables.
So is floccinaucinihilipilification. Does it mean:
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
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