Why are we still so bad at protecting computer systems? Is it because we don’t have good enough technology? Or because we lack sufficient economic incentives to implement that technology? Or because we implement technologies but then fail to use them correctly? Or because the laws governing computer security are so outdated? Or because our legal frameworks are ill-equipped to deal with an international threat landscape? All these reasons—and others— have been offered to explain why we seem to see more and more large-scale cybersecurity incidents and show no signs of getting better at preventing them. This course will examine the non-technical dimensions of this problem—the laws and other policy measures that govern computer security threats and incidents. We will focus primarily on U.S. policy but will also discuss relevant policies in the E.U. and China, as well as international tensions and norms. The central themes of the course will be the ways in which technical challenges in security can be influenced by the social, political, economic, and legal landscapes, and what it means to protect against cybersecurity threats not just by writing better code but also by writing better policies and laws.