Tool to decrypt/encrypt with Atbash automatically. Atbash (Mirror code) is a substitution cipher from the hebraic alphabet. It consists in substitution the first letter of the alphabet with the last one, the second letter, with the second last one, and so on.
Atbash Mirror Cipher - dCode
Tag(s) : Substitution Cipher
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Atbash encryption uses a substitution alphabet and its reciprocal, a combination of the normal alphabet and its reverse alphabet (mirrored).
Example: The latin alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ and its reverse: ZYXWVUTSRQPONMLKJIHGFEDCBA are combine in the substitution table:
Encryption consists in replacing letters from the first with letters from the other one, with is equivalent to replace the first letter of the alphabet A with the last one Z, the second one B with the penultimate Y etc.
Example: MIRROR becomes NRIILI
Decryption is identical to encryption because of the reversible alphabet (due to the symmetry of the backwards alphabet)
Example: ZGYZHS is decrypted ATBASH
dCode offers an encoder and a decoder, but they are actually one and the same Atbash converter.
An Atbash ciphertext has a coincidence index similar to an unencrypted text.
If the encryption used the classical latin alphabet, letters V,G,R,L,M appears the most frequently.
Otherwise the presence of Hebrew characters or a reference to the Dead Sea can be a clue.
The notions of mirror, reflection, axis, direction or sense are also clues.
In the Hebraic alphabet, aleph (first letter) was replaced by tav (last letter) and beth (second letter) with shin (second last), etc. Initials make A,T,B,SH.
Atbash is adaptable to any alphabet, so using the Hebrew alphabet is possible.
The atbash encryption is equivalent to an affine cipher with $ a = -1 $ and $ b = -1 $
Between -1000 and -500 before Christ.