The demise of the Soviet Union, the rise of transnational security threats, and the global advances in cyberspace-related technology have forced the security institutions of the world to tackle new security problems. These events, and several others, require us to look at security problems through a much different lens than previously used. For example, the massive flows of information across the Internet, and the automation of command and control systems, compel security theorists to transform traditional paradigms of security. The aim of this course is to give students a strong introduction to the literature on intra- and international cyber security, from a theoretical and policy perspective. The goal is to be able to apply new and existing security theories for developing public policy to address a host of dynamic security issues in the cyber domain.