Atbash Cipher
Hash & EncryptionEncode and decode text using the ancient Atbash substitution.
About This Tool
A substitution cipher formed by reversing the alphabet, so that A becomes Z, B becomes Y, and so on. A classic cryptographic curiosity.
Frequently Asked Questions
The Atbash cipher is a monoalphabetic substitution cipher originally used to encode the Hebrew alphabet. It is one of the oldest known encryption methods.
It maps the first letter of the alphabet to the last, the second to the second-to-last, and so on (e.g., A=Z, B=Y, C=X).
Yes, because it is a simple mirror of the alphabet, applying the Atbash transformation to an already ciphered text will return the original plain text.
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