In this course, you will examine security for computers and networked information systems. The focus is abstractions, principles, and defenses for implementing military and commercial-grade secure systems. Through this lens, you will explore security and survivability for computers and communications networks as well as policy issues such as the national debates on cryptography policy and the meaning of privacy. That journey will be informed by a survey of technical means for implementing the various properties that comprise "trustworthiness" in a computing system, including mechanisms for authorization and authentication along with cryptographic protocols.