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 great fear that I have regarding the outcome for America of these disclosures is that nothing will change. [People] won't be willing to take the risks necessary to stand up and fight to change things And in the months ahead, the years ahead, it's only going to get worse. [The NSA will] say that because of the crisis, the dangers that we face in the world, some new and unpredicted threat, we need more authority, we need more power, and there will be nothing the people can do at that point to oppose it. And it will be turnkey tyranny.

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.

We're now more than a year since my NSA revelations, and despite numerous hours of testimony before Congress, despite tons of off-the-record quotes from anonymous officials who have an ax to grind, not a single US official, not a single representative of the United States government, has ever pointed to a single case of individualized harm caused by these revelations. This, despite the fact that former NSA director Keith Alexander said this would cause grave and irrevocable harm to the nation.

We can still publicly post a message to Facebook that's globally readable. But we could also adjust things so that they can only be shared with those closest to us, and the confident that this is enforced through both legal and a systemic standards-based protection.

Individuals have international duties which transcend the national obligations of obedience. Therefore individual citizens have the duty to violate domestic laws to prevent crimes against peace and humanity from occurring.

The NSA has built an infrastructure that allows it to intercept almost everything. With this capability, the vast majority of human communications are automatically ingested without targeting. If I wanted to see your emails or your wife's phone, all I have to do is use intercepts. I can get your emails, passwords, phone records, credit cards.