1. Introduction to the Concepts of Security
2. Cryptography Techniques
3. Computer-based Symmetric Key Cryptographic Algorithms
4. Computer-based Asymmetric-Key Cryptography Algorithms
5. Public Key Infrastructure (PKI)
6. Internet-Security Protocols
7. User-Authentication Mechanisms
8. Practical Implementations of Cryptography/Security
9. Network Security, Firewalls, and Virtual Private Networks (VPN)
Appendices
A. Mathematical Background
B. Number Systems
C. Information Theory
D. Real-life Tools
E. Web Resources
F. A Brief Introduction to ASN, BER, DER

In its signature style, the third edition clearly presents all key concepts of the subject like Data Encryption Standard, Ciphers, IP Security and Web Security, via easy-to-follow examples and diagrams, keeping complex mathematical treatments at bay. With ample practical examples, case studies and large number of pedagogy, the book perfectly motivates readers to delve into the application aspects of the subject.