I'm not a politician, and I do not think I am as effective in this way as people who actually prepare for it - is to focus on technical reform, because I speak the language of technology. I spoke with Tim Berners-Lee, the guy who invented the World Wide Web. We agree on the necessity for this generation to create what he calls the Magna Carta for the Internet. We want to say what "digital rights" should be. What values should we be protecting, and how do we assert them.

The power of the presidency is important, but it is not determinative.

If even one country, an Iceland for example, defects from this global legislative bargain and says no, we're not going to enforcement mass surveillance here. We're not going to do that. That's where all of the data centres, all the service providers in the world will relocate to. And I think that gives us a real chance to see a more liberal than authoritarian future.

Encryption works. Properly implemented strong crypto systems are one of the few things that you can rely on. Unfortunately, endpoint security is so terrifically weak that NSA can frequently find ways around it.

People at civil-liberties organizations say it's a sea change, and that it's very clear judges have begun to question more critically assertions made by the executive. Even though it seems so obvious now, it is extraordinary in the context of the last decade, because courts had simply said they were not the best branch to adjudicate these claims - which is completely wrong, because they are the only nonpolitical branch. They are the branch that is specifically charged with deciding issues that cannot be impartially decided by politicians.

I'm not a spy, which is the real question

No one would argue that it's in the United States' interest to have independent knowledge of the plans and intentions of foreign countries. But we need to think about where to draw the line on these kind of operations so we're not always attacking our allies, the people we trust, the people we need to rely on, and to have them in turn rely on us.