Suitable for intermediate course starting in computer security. This sweeping revision of the classic computer security book provides an authoritative overview of computer security for every type of system, from traditional centralized systems to distributed networks and the Internet. Third Edition has been updated to reflect state-of-the-art in networking; cryptography, program and operating system security, administration, law, privacy, and ethical issues, and more. It combines core computer science concepts related to operating systems, networks, databases, and programming, with accessible discussions of the use of cryptography and protocols. Pfleeger, CISSP, currently Master Security Architect for Cable & Wireless, one of the world's leading provider of Internet and secure infrastructure services. They are the author of more than a dozen previous books on computer security, software engineering, software measurement, software quality, and programming.