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substitution cipher
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noun Cryptography.
a cipher that replaces letters of the plain text with another set of letters or symbols.
QUIZ
QUIZ YOURSELF ON "IS" VS. "ARE"
"Is" it time for a new quiz? "Are" you ready? Then prove your excellent skills on using "is" vs. "are."
Question 1 of 7
IS and ARE are both forms of which verb?
Compare transposition cipher.
Origin of substitution cipher
First recorded in 1935â40
Words nearby substitution cipher
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022