substitution cipher
noun
: a cipher in which the letters of the plaintext are systematically replaced by substitute letters compare transposition cipher
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Related Stories To solve the first two passages, codebreakers used vigenere, which is what cryptologists call a polyalphabetic substitution cipher system.
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Courtney Linder, Popular Mechanics, 3 Feb. 2020
Courtney Linder, Popular Mechanics, 3 Feb. 2020
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“Substitution cipher.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/substitution%20cipher. Accessed 25 Apr. 2024.
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