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PrismKit

Classic Ciphers

Local

Encrypt and decrypt with Atbash, rail fence, affine, Playfair and Bacon ciphers, with the rail zig-zag and Playfair key square shown.

Vigenère Cipher

Encrypt or decrypt with the Vigenère, Beaufort or autokey cipher and guess an unknown key with Kasiski and index-of-coincidence analysis.

XOR Cipher

XOR text, hex or base64 data with a repeating key, and brute-force single-byte XOR ranked by how much the result looks like English.