layeredcipher
nounUK /ˈleɪəd ˈsaɪfə/
US /ˈleɪərd ˈsaɪfər/
A layered cipher is a secret code made by putting one code on top of another.
The spy used a layered cipher so that breaking one code would not reveal the message.
OTHER MEANINGS
2. A cipher in which several encryption steps are applied in sequence to the same message.
The layered cipher combined a substitution step with a transposition step.
3. A puzzle or game code that hides clues inside more than one level of encoding.
The escape room's layered cipher needed three separate keys to solve.
4. Any system of secret writing that uses multiple overlapping rules for extra security.
Modern layered ciphers often mix digital and classical methods.