I successfully ended the book Elementary Number Theory by David M. Burton. It is a great book on Number Theory and History of Number Theory. Specially, I loved the concise chapter on Cryptography. Now, I am pretty interested to continue my study in Cryptography. Which books or websites should I read to learn more on Cryptography, if there is more math of it?
Cryptography is a rapidly changing subject at its frontier. However, though it dates from 1997 the Handbook of Applied Cryptography by A. Menezes, P. van Oorschot, and S. Vanstone, has nice surveys of many topics related to cryptography.