Most Americans do not care about exposing themselves to massive data surveillance but they should, says George Washington University law professor and New Republic legal affairs editor Jeffrey Rosen in his new book, "The Naked Crowd." Rosen discussed technology and the uneasy balance between security and privacy on April 20 at 2 p.m. on washingtonpost.com.

Jeffrey Rosen: The book is a response to a challenge by my friend and teacher Lawrence Lessig, who writes about cyberspace. We were on a panel about liberty and security after 9/11, and I denounced the British surveillance cameras, which I had just written about for the New York Times magazine, as a feel good technology that violated privacy without increasing security. Lessig politely but firmly called me a Luddite. These technologies will proliferate whether you like it or not, he said, and you should learn enough about them to be able to describe how they can be designed in ways that protect privacy rather than threatening it. I took Lessig's challenge seriously, and spent a year learning about the technologies and describing the legal and architectural choices they pose. The rest of the book followed naturally, and it's an attempt to think through the behavior of the relevant actors who will decide whether good or bad technologies are adopted -- that is, the public, the executive, the courts, and the Congress.