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.

� propos de l?auteur

Behrouz A. Forouzan graduated from the University of California, Irvine. He is currently a Professor at DeAnza College, where he has been involved in their course development for Computer Information Systems. Additionally, he works as a System Development Consultant for various companies. Forouzan is also the author of many successful programming and networking books including, Data Communications and Networking, TCP/IP Protocol Suite, and Local Area Networks.

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