Do you check it when you travel, do you check it when you're just at home? They'd be able to tell something called your 'pattern of life.' When are you doing these kind of activities? When do you wake up? When do you go to sleep? What other phones are around you when you wake up and go to sleep? Are you with someone who's not your wife?

[Sovereignty] would break the American monopoly, but it would also break Internet business, because you'd have to have a data center in every country. And data centers are tremendously expensive, a big capital investment.

By creating a self-policing, self-reporting, sort of self-monitoring culture through law, through statute, and imposing that on the academic world, I think not only are we losing a significant measure of freedom in academic traditions and in our civil society, but we're actually making ourselves less competitive with every other country around the world that does not do that. Because that's where researchers are going to go and that's where academics are going to go. And ultimately, that's where breakthroughs are going to occur.

The charges [government] brought against me, for example, explicitly denied my ability to make a public-interest defense.

There have been so many individuals who have really put a lot on the line. That they've sacrificed so much to try to protect the principle of source protection in the journalism world. And I think Julian Assange, and WikiLeaks, and Sarah Harrison have really been extraordinary in standing up for that.

I've been recognized every now and then. It's always in computer stores. It's something like brain associations, because I'll be in the grocery store and nobody will recognize me. Even in my glasses, looking exactly like my picture, nobody will recognize me. But I could be totally clean-shaven, hat on, looking nothing like myself in a computer store, and they're like, "Snowden?!"

Privacy is a function of liberty.