Cryptography

On Wednesday, we learned about a form of cryptography, or code language, that uses matrices. In the first step of this worksheet, we had to use an encryption matrix and code Miss V gave us to find out the meaning of the code. We had to use the inverse of the encryption matrix, which is its decryption matrix, to decode the message into new numbers (3 numbers at a time to multiply by the 3X3 decryption matrix). Finally, we had to transfer those new numbers into letters (A=1, B=2, etc.), and the code spelled out the words "MEET ME MONDAY". I then created an encryption matrix of my own in step 2 and made a code. Can you figure out what the code means?