Parma Cryptography Challenge: Level 3

For this level, we're going to test your skills in subtle encryption techniques. You'll need to create a cipher that can encode a simple message with a twist of the knife.

• Use a polybijective cipher with multiple keys.
• Implement Vigenère encryption to encode the message.
• Don't forget about frequency analysis!

This challenge is brought to you by Parma Cryptography, the premier provider of cryptography solutions for the discerning crypto-enthusiast.