Network Security

• 1. Firewalls

• 2. Application level gateways

• 3. Circuit level gateways

• 4. The components of a symmetric key system

• 5. Asymmetric key systems

• 6. Vulnerability to attack

• 7. Hybrid systems

• 8. Implementing encryption in networks

• 9. Link layer encryption

• 10. Encryption and integrity

• 11. Freshness

• 12. Authentication

• 13. Access control

• 14. Introduction

• 15. Terminology and abbreviations

• 16. Background to network security

• 17. Network security when using your computer

• 18. Threats to communication networks

• 19. Important terminology and information for making the most of this section

• 20. Potential network vulnerabilities

• 21. Tapping into transmission media

• 22. Principles of encryption

• 23. An overview of symmetric key systems