This course provides a detailed analysis of the fundamentals of information security in the context of distributed systems and networks. It carefully examines the threat developed in the distributed systems and networks. It examines information security policies in the context of distributed systems and networks. It examines the available security mechanisms that are applicable to the distributed systems and network to include authentication and cryptography. It investigates the application of the security mechanisms to the underlying services of the distributed system and network and the specific threat mitigation achieved. It investigates the integration of secure services into the development of secure distributed systems and network applications and utilities to include secure mail, secure web services, secure wireless. It investigates system security issues to include firewalls, and intrusion detection systems.