Cryptography Worksheet

In class, we went through several aspects of cryptography:

1. We found a decryption matrix from an encryption matrix by finding the inverse of the encryption matrix.
2. We split the encrypted message into groups of 3, and then multiplied each group of 3 by the decryption matrix in order to find their respective values.
3. We used the code 1=A, 2=B, 3=C, and so on, to determine the alphabetical counterpart of each number and to subsequently determine the final message.
4. We selected our own invertible matrix and multiplied the resultant number groups from step 2 by this matrix to encrypt the message ourselves.

Here is a picture of this worksheet: