Algebraic Aspects of Cryptography (Algorithms and Computation in Mathematics, Vol. 3)
by Neal Koblitz
Category: Computers

From the reviews: "This is a textbook in cryptography with emphasis on algebraic methods. It is supported by many exercises (with answers) making it appropriate for a course in mathematics or computer science. [...] Overall, this is an excellent expository text, and will be very useful to both the student and researcher." Mathematical Reviews