The Atbash Cipher

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What does it do?

Atbash is a substitution cipher that swaps each letter with one on the other end of the alphabet. A becomes Z, B becomes Y, C becomes X, and so on.


This ancient cipher is named after the first/last, and second/second last letters of the Hebrew alphabet: Aleph-Tav-Beth-Shin. Some scholars believe that the Atbash cipher was used to encode certain names and places in the Bible.