Oligarchs and government spies know where we are, what we want, and even our innermost thoughts. Who can protect us? Are whistleblowers like Snowden the white knights of the digital age? Or is the pursuit of radical openness itself the real threat we face?

In this 32 minute video from the Institute of Arts and Ideas, produced in association with the Observer, Mary-Ann Sieghart interrogates former GCHQ director David Omand, former Energy Secretary Chris Huhne and Observer columnist John Naughton.