People have to understand that they can reject technology. They can turn off their cell phone. They can stop looking at their e-mail. It's there if they want it. It's not being forced on them.

Encryption...is a powerful defensive weapon for free people. It offers a technical guarantee of privacy, regardless of who is running the government... It's hard to think of a more powerful, less dangerous tool for liberty.

We invented our computers in the '80s. We networked them together in the '90s. Now we're giving them eyes, ears and sensory organs. And we're asking them to observe and manipulate the world on our behalf.

Internet becoming accessible everywhere, whether it was Wi-Fi at work, on your cell phone as you traveled. People had it at home with broadband. There was a big change.It used to be people used the Internet primarily at work, because that's where they had a good connection. Now they're using it at home. And the second big change is, they used it not just to get information, but to communicate with one another. And, so, it became not simply an information exchange, but a personal exchange, a communication mechanism.

I became a real free market fanatic. I'm probably less so now than even two or three years ago.

People still have a choice, but, if they find it all too confusing, or they just want someone else to make a choice for them, there's a default that works pretty well. That's this concept of libertarian paternalism. And it's handy.

I believe in markets doing what they do well, which is to develop technology, and letting citizens do what they ideally do well, which is to set policy.