replacement cipher
nounUK /rɪˈpleɪsmənt ˈsaɪfə/
US /rɪˈpleɪsmənt ˈsaɪfər/
A replacement cipher is a secret code where each letter is swapped for a different letter.
The children used a replacement cipher to hide their treasure map message.
RELATED WORDS
OTHER MEANINGS
2. A method of hiding a message by trading each symbol for another symbol according to a fixed rule.
The spy wrote the note in a replacement cipher so only her friend could read it.
3. A puzzle where you must figure out which letter stands for which.
He solved the replacement cipher in the newspaper by guessing the most common letter.
4. A way of scrambling text that keeps the same letter count but changes the letters.
A replacement cipher changes the letters but not the length of the sentence.