I've been recognized every now and then. It's always in computer stores. It's something like brain associations, because I'll be in the grocery store and nobody will recognize me. Even in my glasses, looking exactly like my picture, nobody will recognize me. But I could be totally clean-shaven, hat on, looking nothing like myself in a computer store, and they're like, "Snowden?!"

It's critical how we want to use these spy programs, these electronic capabilities, where we want to draw the line, and who should approve these programs, these decisions, and at what level, for engaging in operations that could lead us as a nation into a war.

When it comes to cyber conflicts between, say, America and China or even a Middle Eastern nation, an African nation, a Latin American nation, a European nation, we have more to lose.

I have used mass surveillance to target people, so I do know how it works.

A political decision has been made not to irritate the intelligence community. The spy agencies are really embarrassed, they're really sore - the revelations really hurt their mystique. The last ten years, they were getting the Zero Dark Thirty treatment - they're the heroes. The surveillance revelations bring them back to Big Brother kind of narratives, and they don't like that at all.

A lot of people in 2008 voted for Obama. I did not vote for him. I voted for a third party. But I believed in Obama's promises. He continued with the policies of his predecessor.

Anyway, it's not true that the authorities cannot access the content of the phone even if there is no back door. When I was at the NSA, we did this every single day, even on Sundays. I believe that encryption is a civic responsibility, a civic duty.