Can we safeguard our nation’s security without weakening cherished liberties? And how does technology affect the potential conflict between these fundamental goals? These questions acquired renewed urgency in the wake of the 9/11 attacks. They also spurred heated debates over such controversial measures as Total Information Awareness and the USA PATRIOT Act. In this volume, leading figures from the worlds of government, public policy, and business analyze the critical issues underlying these debates. The first set of essays examines the relationship between liberty and security and explores where the public stands on how best to balance the two. In the second section, the authors focus on information technology’s role in combating terrorism, as well as tools, policies, and procedures that can strengthen both security and liberty at the same time. Finally, the third part of the book takes on a series of key legal issues concerning the restrictions that should be placed on the government’s power to exploit these powerful new technologies. Contributors include Zoë Baird (Markle Foundation), James Barksdale (Barksdale Group), Bruce Berkowitz (Hoover Institution), Jerry Berman (Center for Democracy and Technology), Beryl A. Howell (Stroz Friedberg), Jon Kyl (U.S. Senate), Gilman Louie (In-Q-Tel), David Luban (Georgetown University), Richard A. Posner (U.S. Court of Appeals for the Seventh Circuit), Marc Rotenberg (Electronic Privacy Information Center), James Steinberg (Brookings), Larry Thompson (Brookings), Gayle von Eckartsberg (In-Q-Tel), and Alan F. Westin (Columbia University).