Atbash Cipher

Alphabet mapping

Atbash mirrors the alphabet: A ↔ Z, B ↔ Y, C ↔ X, and so on. It has no key.

Type: Monoalphabetic substitution Key: None Direction: Same both ways A ↔ Z B ↔ Y M ↔ N

Options

Preserve case Keep punctuation & numbers Remove whitespace

Group letters

Atbash is self-inverse: encrypting and decrypting use the same letter mapping.

Input

Output

Mode: Encrypt Operation: Same mapping either way Letters processed: 0 Input chars: 0 Output chars: 0 Blocks: 0

Classic example: plaintext ATTACK AT DAWN becomes ZGGZXP ZG WZDM. Because Atbash is self-inverse, applying it again returns the original text. When Group letters is on, output is converted to uppercase letters-only blocks.