Crypto links Albrecht Beutelspacher . Dorothy Denning . A Course in Number Theory and Cryptography 2nd ed. See also the Springer Verlag Cryptology and Computer Security page, and the Lecture Notes in Computer Science Cryptography and Security List . Alfred J. Menezes, Paul C. van Oorschot, Scott A. Vanstone.
Several chapters are available online.
Applied Cryptography 2nd ed. Colin Williams, Scott Clearwater. See Ultimate Zero and One by the same authors for a recent book on quantum computing and its impact on quantum cryptography. In that light, if you care about the privacy of your phone conversations, check out Starium voice encryption hardware. For privacy and anonymity resources, see the Anonymizer , FreeNet , Onion Routing , Zero Knowledge Freedom Server , Crowds and the Publius Anonymous Publishing System .