This is our Atbash Cipher Calculator. It can be used to encrypt or decrypt Atbash messages. Atbash Cipher is an ancient encryption message that originated in the Middle East. It was originally used with the Hebrew alphabet and it is quite simple. It simply reverses the alphabet and transposes the message onto the reverse alphabet. For example, the string "ABC" would be encrypted as "ZYX". If you encrypt a string twice, it returns to it's original string, which is why this calculator works both as an encrypter and decrypter. Please type in the box below to encrypt or decrypt a message with the Atbash Cipher.