two-alphabet cipher
nounUK /tuː ˈælfəbɛt ˈsaɪfə/
US /tu ˈælfəbɛt ˈsaɪfər/
A secret code that uses two different alphabets to hide a message.
The spy wrote the note in a two-alphabet cipher so only her partner could read it.
OTHER MEANINGS
2. A cipher that switches between two alphabets depending on the position of each letter.
In the two-alphabet cipher, odd letters came from the first alphabet and even letters from the second.
3. A coding method where one alphabet scrambles the message and another restores it.
The puzzle used a two-alphabet cipher: one table to encrypt and one to decrypt.
4. A puzzle technique pairing two alphabets to create a hidden word.
The children solved the two-alphabet cipher by matching each symbol to its partner letter.