Polybius Square

Ancient Greek grid cipher encoding each letter as a (row, col) coordinate pair in a 5×5 grid. J is merged into I.

legacyclassical

Plaintext / Input Message

Cryptographic Key / Shift

Auto Compute

Workspace Presets

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Saved presets for this cipher

Output Result

No output

Imported traces are validated and replayed locally. They never run a cipher operation automatically.