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PrismKit

XOR Cipher

Local

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.

Classic Ciphers

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

EMV TLV Decoder

Decode EMV BER-TLV hex into a tag tree with names and bit-level TVR, AIP, terminal capabilities and CVM results.