<P>Building on the success of the first edition, <EM><STRONG>An Introduction to Number Theory with Cryptography, Second Edition,</STRONG></EM> increases coverage of the popular and important topic of cryptography, integrating it with traditional topics in number theory. </P><br/><br/><P>The authors have written the text in an engaging style to reflect number theory''s increasing popularity. The book is designed to be used by sophomore, junior, and senior undergraduates, but it is also accessible to advanced high school students and is appropriate for independent study. It includes a few more advanced topics for students who wish to explore beyond the traditional curriculum.</P><br/><br/><P></P><br/><br/><P>Features of the second edition include</P><br/><br/><P></P><br/><br/><UL><br/><br/><LI>Over 800 exercises, projects, and computer explorations</LI></UL><br/><br/><P></P><br/><br/><UL><br/><br/><LI>Increased coverage of cryptography, including Vigenere, Stream, Transposition,and Block