Basically, when encoded, an "A" becomes a "Z", "B" turns into "Y", etc.

A) becomes the last letter (e.g.

Even if an adversary doesn't knowa piece of ciphertext has been enciphered with the Atbash cipher, they can still break it by assuming it isa substitution cipher and deter… The Atbash Cipher maps each letter of an alphabet it to its reverse, so that the first letter (e.g. Because reversing the alphabet twice will get you actual alphabet, you can encipher and decipher a message using the exact same algorithm. The Atbash cipher can be implemented as an Affine cipher by setting both "a" and "b" to 25. Thus, given a piece of ciphertext, known to have been enciphered using the Atbash Cipher, anyone who intercepts the message can easily decipher it to retrieve what was meant to be concealed. As opposed to a Caesar Cipher, the Atbash cipher does not need a key.

The Atbash cipher is a very specific case of a substitution cipher where the letters of the alphabet are reversed.
I.e.

The Atbash cipher is a very common, simple cipher.

The Atbash cipher offers almost no security, and can be broken very easily. The Atbash cipher is a substitution cipher with a specific key where the letters of the alphabet are reversed. The Atbash Cipher is a very weak substitution cipher, since there is no secret key behind generating the ciphertext alphabet to perform the encryption. It was for the Hebrew alphabet, but modified here to work with the English alphabet. In otherwords, all As are replaced with Zs, all Bs are replaced with Ys, and so on. Z), the second letter (B) becomes the second to last letter (Y), and so on.

It was originally used for the Hebrew alphabet, but can be used for any alphabet. really simple substitution cipher that is sometimes called mirror code It was originally used to encode the Hebrew alphabets but it can be modified to encode any alphabet.

Definition: Atbash cipher is a substitution cipher with just one specific key where all the letters are reversed that is A to Z and Z to A. It is hence easier to break!

all 'A's are replaced with 'Z's, all 'B's are replaced with 'Y's, and so on.