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

You can show a guy sort of peeking over the wall, you can see a guy tunneling underneath, you can see a guy going through the front door. All of those, in cyber terms, are vulnerabilities, because it's not that you have to look for one hole of a specific type. It's the whole paradigm.

I don't spend all day running hand-on-hat from shadowy figures - I'm in exile.

How do we preserve our civil rights, our traditions as a liberal democracy, in a time when government power is expanding and is more and more difficult to check?

We can plant bugs in machines. Once you go on the network, I can identify your machine. You will never be safe whatever protections you put in place.

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.

If an adversary didn't target our power plants but they did target the core routers, the backbones that tie our internet connections together, entire parts of the United States could be cut off. That would have a tremendous impact on us as a society and it would have a policy backlash.