Chapter 8:Network Security Chapter goals: understand principles of network security: o cryptography and its many uses beyond "confidentiality" o authentication o message integrity o key distribution Osecurity in practice: o firewalls o security in application,transport,network,link layers 8:Network Security 8-28: Network Security 8-2 Chapter 8: Network Security Chapter goals:  understand principles of network security:  cryptography and its many uses beyond “confidentiality”  authentication  message integrity  key distribution  security in practice:  firewalls  security in application, transport, network, link layers