Book List:

Other Textbooks covering the material of the course:

• J. A. Buchmann. Introduction to Cryptography. Springer-Verlag, New York, 2001.
• Paul Garrett. Making, Breaking Codes - An Introduction to Cryptology. Prentice Hall, Upper Saddle River, N.J., 2001.
• Richard A. Mollin. An Introduction to Cryptography. CRC Press, Boca Raton, 2000.

Textbooks with a more applied bent:

• William Stallings. Cryptography and Network Security - Principles and Practice. 2nd ed., Prentice Hall, Upper Saddle River, N.J., 1999.
• Bruce Schneier. Applied Cryptography, 2nd ed., Wiley, New York, 1996. (Often considered the essential reference for those who apply crptography)
• H. X. Mel and Doris Baker. Cryptography Decrypted. Addison-Wesley, 2001. (More "popular", more internet-oriented)

Textbooks with a more mathematical bent:

• Neal Koblitz. A Course in Number Theory and Cryptography. Springer-Verlag, New York, 1994.
• Neal Koblitz. Algebraic Aspects of Cryptography. Springer-Verlag, New York, 1998.

Reference books:

• A. J. Menezes, P. C. van Oorschot, and S. A. Vanstone. Handbook of Applied Cryptography. CRC Press, Boca Raton, 1997. (At this time the definitive reference for modern cryptography and its mathematical background.)
• F.L. Bauer. Decrypted Secrets - Methods and Maxims of Cryptology. 2nd Ed., Springer-Verlag, New York, 2000. (Very complete and scientifically strong account of cryptology from a historical perspective).

Historical:

• David Kahn. The Codebreakers. Macmillan, New York, 1967. Still in print: Scribner, New York, 1996. (The definitive history of cryptography up until the 1950s; almost 1200 pages.)
• Simon Singh. The Code Book - The Science of Secrecy from Ancient Egypt to Quantum Cryptography. Anchor Books, 1999. (A very readable history of cryptography; the more modern aspects, as well as an outlook into the future, are also covered).