-Which topics and ideas do you think are the most important out of those we have studied?
It seems that the most important ideas are the more math related concepts. This is good, because I don't think that it would be very fair to have a closed book exam on some of the more complex processes (DES, AES, etc). I think it is important to understand ideas behind different ciphers, such as their strengths and weakness compared to other ciphers.
-What kinds of questions do you expect to see on the exam?
I expect we'll be asked a number of mathematical calculations (Euclidean algorithm, extended Euclidean algorithm, gcd, solving ax+by=d, congruences, etc.) as well as some basic definition questions, including some illustrations of different cipher systems.
-What do you need to work on understanding better before the exam?
I need to have a solid understanding of the different modes of operation (ECD, CBC, CTR), and be able to differentiate between different systems.
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