Noun
English Wikipedia has an article on:atbashWikipedia
atbash (uncountable)
A simple substitution cipher in which each occurrence of the first letter of the alphabet is substituted with the last, second with next to last, and so on.
Steganography, ROT1, Transposition, Ceasar, Atbash, Monoalphabetic Substitution, Vigenère, Enigma to name a few. Source: Internet