Breaking the Hill Cipher Moral of the story from Part I is that if you know the encryption matrix, you can find the decryption matrix, and decrypt an encrypted message. Now, you are a SPY who has gained some intelligence about the enemy. Your team has intercepted an encrypted message and its original message. You know that other messages have been sent using the same encryption key, so you want to use this intelligence to find the encryption key. The messages you have are: Original message