keyword substitution cipher
nounA keyword substitution cipher is a secret code that uses a special word to mix up the alphabet.
The spy used a keyword substitution cipher to hide the message from his enemies.
RELATED WORDS
OTHER MEANINGS
2. A cipher where a keyword removes duplicate letters and fills the start of a scrambled alphabet.
In a keyword substitution cipher, the keyword letters come first, then the rest of the alphabet.
3. A method of encrypting text by replacing each letter with another letter according to a keyword-based mapping.
She encrypted the note with a keyword substitution cipher so only her friend could read it.
4. A classical encryption technique that combines a keyword with the alphabet to create a substitution rule.
The puzzle used a keyword substitution cipher, and the keyword was hidden in the title.