With the emergence of the World Wide Web, security has turned out to be a major concern. Everyday several transactions take place over the net, be it purchasing books online, transferring funds or even communicating through emails. This overwhelming dependency can only be justified if people using the Internet can be assured that their transactions are kept safe and confidential. The vulnerability of Internet has compelled many thinkers in the field of Computer Science to come out with methods to make this open forum devoid of security problems. The subject of Cryptography and Network Security is precisely the field of study where these methods are studied.

In this new first edition, well-known author Behrouz Forouzan uses his accessible writing style and visual approach to simplify the difficult concepts of cryptography and network security. While many security books assume knowledge of number theory and advanced math, or present mainly theoretical ideas, Forouzan presents difficult security topics from the ground up. A gentle introduction to the fundamentals of number theory is provided in the opening chapters, paving the way for the student to move on to more complex security and cryptography topics. Difficult math concepts are organized in appendices at the end of each chapter so that students can first learn the principles, then apply the technical background. Hundreds of examples, as well as fully coded programs, round out a practical, hands-on approach which encourages students to test the material they are learning.

This Online Learning Center is designed to enhance your learning experience. It provides a broad array of resources that will benefit both the instructors and students. Visit the Information Center to unravel the book's features.

The Student’s Center contains the Web Links and a sample chapter, Chapter 2 on Mathematics of Cryptography from the book. This will give you the flavor of the published book.

The Instructor’s Center provides instructors with Instructor's Manual, Chapter-wise PowerPoint Presentations and Image Library.

This part of the site is password protected and will be available only to the instructors who adopt the book. If you are an adopter and require a password, contact your McGraw-Hill representative or send a request from this Web site.

This site will evolve over time and we would be able to provide you with a wide range of resources that are currently under development.