This reference presents modern concepts of computer security. Subjects covered include private-key and public-key encryption, hashing, digital signatures, authentications, secret sharing, group-oriented cryptography, and many others. The section on intrusion detection and access control provides examples of security systems implemented as a part of an operating system. Database and network security is also discussed. The final chapters introduce modern e-business systems based on digital cash.

TABLE OF CONTENTS

1. Introduction.- 2. Background Theory.- 3. Private-Key Cryptosystems.- 4. Public-Key Cryptosystems.- 5. Pseudorandomness.- 6. Hashing.- 7. Digital Signatures.- 8. Authentication.- 9. Secret Sharing.- 10. Group-oriented Cryptography.- 11. Key Establishment Protocols.- 12. Zero Knowledge Proof Systems.- 13. Identification.- 14. Intrusion Detection.- 15. Electronic Elections and Digital Money.- 16. Database Protection and Security.- 17. Access Control.- 18. Network Security.- Bibliography.