In this session, we approach the question of “security and privacy in the information economy” as computer science researchers. There are two major components to the computer science research point of view: namely that of the theorist, whose goal is to develop a rigorous mathematical theory of security and privacy, and that of the practitioner, whose goal is to build systems that are secure and private and that are widely and successfully used in the real world. After many years of working fairly independently, security theorists and security practitioners are now cooperating to meet the pressing demands of the information economy.