substitution cipher

noun Cryptography.

a cipher that replaces letters of the plain text with another set of letters or symbols.

Nearby words

substation, substernal goiter, substituent, substitute, substitution, substitution cipher, substitution product, substitution reaction, substitution therapy, substitution transfusion, substitutive

Compare transposition cipher.

Origin of substitution cipher

First recorded in 1935–40

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019