Handbook of Applied Cryptography Here is a complete on-line textbook. You are not allowed to print a copy of this book, especially not at UTSA. (The copyright holder does not allow printing the book. The printed copy will not do you much good and will waste a lot of paper. You may make an electronic copy for your own use.)

Handbook of Applied Cryptography:, by Alfred J. Menezes, Paul C. van Oorschot and Scott A. Vanstone, CRC Press, ISBN: 0-8493-8523-7, October 1996, 816 pages, Fifth Printing (June 2001). $94.95 at amazon.com
Available at:

This book is well worth purchasing, even though it is available online. If you buy it, be sure to get the Fifth Printing which has the latest corrections. (The Fifth Printing has "Revised Reprint with Updates" on the front cover at the top, unlike the picture at the left.)