changingcipher
nounUK /ˈtʃeɪndʒɪŋ ˈsaɪfə/
US /ˈtʃeɪndʒɪŋ ˈsaɪfər/
A changing cipher is a secret code that changes its rules as it goes.
The spy used a changing cipher so enemies could not read the messages.
RELATED WORDS
OTHER MEANINGS
2. A puzzle whose answer changes each time you solve it.
The magazine printed a changing cipher that gave a new word every week.
3. A method of hiding words by swapping letters in a pattern that keeps moving.
She wrote her diary in a changing cipher to keep it private.
4. A game where players decode messages using rules that shift after each turn.
At the party, the changing cipher game kept everyone guessing.