AzelusLightvale-ComfyUI-ARG-Toolkit/web/docs/Playfair.md

Playfair Cipher

Encrypts or decrypts a message using the Playfair cipher.

Source library: secretpy

Historical Context

The Playfair cipher was the first practical digraph substitution cipher. It was invented in 1854 by Charles Wheatstone, but was named after Lord Playfair who promoted its use.

How it Works

The Playfair cipher uses a 5x5 grid of letters, based on a keyword, to encrypt pairs of letters (digraphs). The encryption rules are based on the relative positions of the two letters in the grid.

Parameters

• text: The message to encrypt or decrypt.
• alphabet: The alphabet to use for the cipher. Can be a string of characters or a predefined alphabet from secretpy.alphabets.
• key: The key for the cipher.
• mode: Whether to encrypt or decrypt the message.
• keep_formatting: Whether to keep the original formatting of the message.