Im doing a Maths project at school. We're working from the "Mathematics for Year 12 Mathematical Studies" book from Haese & Harris Pub. One of the DI's use matricies for encryption and it says to research "Hill ciphers" and comment on their differences. Ive search the net and i cant find any differences, none at all. I was wondering if someone could try to explain Hill ciphers more througherly. If you need more explaination as to how they are doing it in the book just give us a buzz. Hope you can help!