Definition of the Atbash cipher

The Atbash cipher is a mono-alphabetic substitution cipher, which cipher/deciphers by reversing the order of the alphabet and mapping letters to the reversed alphabet.

Technically, this is a special case of the affine cipher where the a and b variables both equal to one less than the alphabet length and m is the alphabet length in Affine cipher formula.

Atbash cipher table
Alphabet
Ciphered