The PC1 cipher is a simple polyalphabetic substitution cipher. It is a variation of the Vigenère cipher, which uses a longer repeating keyword to encrypt text. The PC1 cipher employs a predefined encryption table (or matrix) to map plaintext characters to ciphertext characters based on the key and the position of the characters. Here's a brief overview of how the PC1 cipher works: 1. **Key Selection**: A keyword or key phrase is chosen.
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