Recently 50 million Facebook users had their personal information extracted and used for political and commercial purposes. In the wake of this scandal, we’ve all become much more aware of how our use of social media clashes with our desire for privacy. Are technical fixes and awareness enough, or is it time for Facebook and other online services to be regulated? Our guest Woodrow Hartzog is a professor of law and computer science at Northeastern University and discusses the battle and future of our personal information. He has a new book out from Harvard University Press entitled Privacy’ s Blueprint : The Battle to Control the Design of New Technologies.