When we look at the full-on mass surveillance watching everyone in the country, in the United States, it doesn't work. It didn't stop the attacks in Boston. The marathon bombings. Where again, we knew who these individuals were. It didn't stop the Underwear Bomber, whose father walked into an embassy and warned us about this individual before he walked onto an airplane. And it's not going to stop the next attacks either. Because again, they're not public safety programmes. They're spying programmes. They are valuable for spying.

Lawyers from the NSA, as well as the UK's GCHQ, work very hard to search for loopholes in laws and constitutional protections that they can use to justify indiscriminate, dragnet surveillance operations that were at best unwittingly authorized by lawmakers.

The only reason I do these interviews - I hate talking about myself, I hate doing this stuff - is because incredibly well-meaning people, whom I respect and trust, tell me that this will help bring about positive changes. It's not going to cause a sea change, but it will benefit the public.

We decentralise permissions over the use of our communications.

I've got more than enough for my needs [for social life in Moscow], let's put it that way.

There are even a few [people] who still honestly believe I sold information to [Vladimir] Putin - like personally, in exchange for asylum. And this is after the Senate Intelligence Committee chair, who gets to read the NSA's reporting on my activities every morning, said all of these conspiracies are delusional.

Presidents should not be exempted from the same standards of reason and evidence and justification that any other citizen or civil movement should be held to.