Chapter 8 roadmap 8.1 What is network security? 8.2 Principles of cryptography 8.3 Message integrity,authentication 8.4 Securing e-mail 8.5 Securing TCP connections:SSL 8.6 Network layer security:IPsec 8.7 Securing wireless LANs 8.8 Operational security:firewalls and IDS Network Security 8-3 Network Security 8-3 Chapter 8 roadmap 8.1 What is network security? 8.2 Principles of cryptography 8.3 Message integrity, authentication 8.4 Securing e-mail 8.5 Securing TCP connections: SSL 8.6 Network layer security: IPsec 8.7 Securing wireless LANs 8.8 Operational security: firewalls and IDS