For One-semester, Undergraduate- Or Graduate-level Courses In Cryptography, Computer Security, And Network Security. In This Age Of Viruses And Hackers, Of Electronic Eavesdropping And Electronic Fraud, Security Is Paramount. As The Disciplines Of Cryptography And Network Security Have Matured, More Practical, Readily Available Applications To Enforce Network Security Have Developed. This Text Provides A Practical Survey Of Both The Principles And Practice Of Cryptography And Network Security. First, The Basic Issues To Be Addressed By A Network Security Capability Are Explored Through A Tutorial And Survey Of Cryptography And Network Security Technology. Then, The Practice Of Network Security Is Explored Via Practical Applications That Have Been Implemented And Are In Use Today.Table Of Contents: Notation Preface Readers Guide SYMMETRIC CIPHERS Overview Classical Encryption Techniques Block Ciphers And The Data Encryption Standard Introduction To Finite Fields Advanced Encryption Standard More On Symmetric Ciphers Confidentiality Using Symmetric Encryption PUBLIC-KEY ENCRYPTION AND HASH FUNCTIONS Introduction To Number Theory Public-Key Cryptography And RSA Key Management Other Public-Key Cryptosystems Message Authentication And Hash Functions Hash And Mac Algorithms Digital Signatures And Authentication Protocols NETWORK SECURITY PRACTICE Authentication Applications Electronic Mail Security IP Security Web Security SYSTEM SECURITY Intruders Malicious Software FirewallsAPPENDICES Appendix A. Standards And Standard-Setting Organizations Appendix B. Projects For Teaching Cryptography And Network Security Online Appendices Appendix C. Simplified Des Appendix D. The Meaning Of Mod Appendix E. More On Simplified AES Appendix F. Knapsack Public-Key Algorithm Appendix G. Proof Of The Digital Signature Algorithm Glossary References Index List Of Acronyms