The NSA has built an infrastructure that allows it to intercept almost everything. With this capability, the vast majority of human communications are automatically ingested without targeting. If I wanted to see your emails or your wife's phone, all I have to do is use intercepts. I can get your emails, passwords, phone records, credit cards.

The bare bones tools for a cyber-attack are to identify a vulnerability in the system you want to gain access to or you want to subvert or you want to deny, destroy, or degrade, and then to exploit it, which means to send codes, deliver code to that system somehow and get that code to that vulnerability, to that crack in their wall, jam it in there, and then have it execute.

When it comes to political engagement, I'm not a politician - I'm an engineer.

A child born today will grow up with no conception of privacy at all. They'll never know what it means to have a private moment to themselves an unrecorded, unanalysed thought. And that's a problem because privacy matters, privacy is what allows us to determine who we are and who we want to be.

It's OK if we wiretap Osama bin Laden. I want to know what he's planning - obviously not him nowadays, but that kind of thing. I don't care if it's a pope or a bin Laden. As long as investigators must go to a judge - an independent judge, a real judge, not a secret judge - and make a showing that there's probable cause to issue a warrant, then they can do that. And that's how it should be done.

We have the right of revolution. Revolution does not always have to be weapons and warfare; it's also about revolutionary ideas.

You shouldn't send an email from a computer that's associated with you if you don't want it to be tracked back to you. You don't want to hack the power plant from your house if you don't want them to follow the trail back and see your IP address.