Atbash Cipher
Encrypt with the simplest substitution cipher: A=Z, B=Y.
Result
Svool Dliow
Atbash maps each letter to its mirror in the alphabet. A becomes Z, B becomes Y, and so on. Encryption and decryption are the same operation, so feeding the output back in returns the original text. Case is kept, non-letters pass through.
About
Atbash maps each letter to its mirror in the alphabet. A becomes Z, B becomes Y, M becomes N. Encryption and decryption are the same operation. Originated for Hebrew and pops up in puzzles and classical literature.
How to use
- Paste your text.
- See the Atbash output.
FAQ
Is Atbash secure?+
No. It's a single-key substitution that anyone can solve by hand in seconds. It's a historical curiosity at this point.
Why is encrypt and decrypt the same?+
Because the mapping is its own inverse. A maps to Z and Z maps back to A. Apply twice, you get the original.