A practical guide to Cryptography and its use in the Internet and other communication networks. This overview takes the reader through basic issues and on to more advanced concepts, to cover all levels of interest. Coverage includes all key mathematical concepts, standardisation, authentication, elliptic curve cryptography, and algorithm modes and protocols (including SSL, TLS, IPSec, SMIME,& PGP protocols). * Details what the risks on the internet are and how cryptography can help * Includes a chapter on interception which is unique amongst competing books in this field * Explains Public Key Infrastructures (PKIs) - currently the most important issue when using cryptography in a large organisation * Includes up-to-date referencing of people, organisations, books and Web sites and the latest information about recent acts and standards affecting encryption practice * Tackles the practical issues such as the difference between SSL and IPSec, which companies are active on the market and where to get further information

Foreword by Carl Ellison. PART 1: WHY CRYPTOGRAPHY ON THE INTERNET? 1. Introduction. 2. What is cryptography and why is it so important? 3. How is it possible to eavesdrop on the Internet? PART 2: THE PRINCIPLES OF CRYPTOGRAPHY. 4. Symmetric encryption. 5. Modern symmetric encryption algorithms. 6. Asymmetrical encryption. 7. Digital signatures. 8. Cryptographic hash functions. 9. Cryptographic random generators. PART 3: ADVANCED CRYPTOGRAPHY. 10. Standardisation in cryptography. 11. Block cipher modes of operation and data transformation for asymmetrical algorithms. 12. Cryptographic protocols. 13. Authentication. 14. Cryptosystems based on elliptic curves. 15. Implementating cryptography. PART 4: PUBLIC KEY INFRASTRUCTURES. 16. Public key infrastructures. 17. How a PKI works. 18. Digital certificates. 19. Certificate servers. 20. Practical aspects of PKI construction. PART 5: CRYPTO PROTOCOLS FOR THE INTERNET. 21. The Internet and the OSI model. 22. Crypto standards for OSI Layers 1 and 2. 23. IPSec (Layer 3). 24. SSL, TLS and WTLS (Layer 4). 25. Cryptographic standards for the World Wide Web (Layer 7). 26. E-mail encryption standards (Layer 7). 27. Internet payment systems (Layer 7). 28. Further Application Layer protocols. PART 6: MORE ABOUT CRYPTOGRAPHY. 29. Political aspects of cryptography. 30. People who play a role in cryptography. 31. Where to find out more about cryptography. 32. The last chapter. Appendix A: List of abbreviations. Appendix B: Bibliography. Index.