Encryption works. Properly implemented strong crypto systems are one of the few things that you can rely on. Unfortunately, endpoint security is so terrifically weak that NSA can frequently find ways around it.

I don't want to live in a world where everything that I say, everything I do, everyone I talk to, every expression of creativity or love or friendship is recorded.

What we're really debating is not security versus liberty, it's security versus surveillance. When we talk about electronic interception, the way that surveillance works is it preys on the weakness of protections that are being applied to all of our communications. The manner in which they're protected.

When I was working in Japan, I created a system for ensuring that intelligence data was globally recoverable in the event of a disaster. I was not aware of the scope of mass surveillance. I came across some legal questions when I was creating it. My superiors pushed back and were like, "Well, how are we going to deal with this data?" And I was like, "I didn't even know it existed."

The issue I brought forward most clearly was that of mass surveillance, not of surveillance in general.

All those people who went out [to Occupy Wall Street] missed work, didn't get paid. Those were individuals who were already feeling the effects of inequality, so they didn't have a lot to lose. And then the individuals who were louder, more disruptive and, in many ways, more effective at drawing attention to their concerns were immediately castigated by authorities. They were cordoned off, pepper-sprayed, thrown in jail.

The majority of terrorist attacks that have been disrupted in the United States have been disrupted due to things like the Time Square bomber, who was caught by a hotdog vendor, not a mass surveillance program, not a cyber-espionage campaign.