There's a real danger in the way our representative government functions today. It functions properly only when paired with accountability.

A zero-day exploit is a method of hacking a system. It's sort of a vulnerability that has an exploit written for it, sort of a key and a lock that go together to a given software package. It could be an internet web server. It could be Microsoft Office. It could be Adobe Reader or it could be Facebook.

By leaning on companies, by leaning on infrastructure providers, by leaning on researchers, graduate students, post-docs, even undergrads, to look at the challenges having an untrusted internet, where we have to put our communications on wires that are owned by a phone company that we can't trust, that's working in collaboration with a government that we can't trust, in areas around the world, we can restructure that communications fabric in a way that it's encrypted.

The courts were afraid to challenge executive declarations of what would happen. Now, over the last year, we have seen - in almost every single court that has had this sort of national-security case - that they have become markedly more skeptical.

The way the United States intelligence community operates is it doesn't limit itself to the protection of the homeland. It doesn't limit itself to countering terrorist threats, countering nuclear proliferation. It's also used for economic espionage, for political spying to gain some knowledge of what other countries are doing.

We've seen a departure from the traditional work of the National Security Agency. They've become sort of the national hacking agency, the national surveillance agency. And they've lost sight of the fact that everything they do is supposed to make us more secure as a nation and a society.

The rule of law doesn't mean the police are in charge, but that we all answer to the same laws.