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Atbash Cipher

A monoalphabetic substitution cipher formed by reversing the alphabet (A becomes Z, B becomes Y, etc.).

Brokenclassical

Plaintext / Input Message

No key required for this cipher

This algorithm operates using a fixed transformation or deterministic digest rule.

Auto Compute

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Preset nameSave key with preset — disabled by default. Stored keys remain readable to anyone with access to this browser profile.

Saved presets for this cipher

Output Result

No output yetRun a computation to see the encrypted / decrypted result.

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Continue your cryptography learning path

A polygraphic substitution cipher that encrypts pairs of letters using a dynamic 5x5 key matrix.

A polyalphabetic substitution cipher that uses a keyword to shift characters in repeating cycles.

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