When we have some horrible terrorist attacks happen in some country we see in the recording that follows, that the intelligence community already knew about these people in advance. We know that these countries were involved in intelligence sharing premiums, that they benefited from mass surveillance, and yet they didn't stop the attacks. Yet at the same time we immediately see intelligence officials running to the newspapers and claiming that we need more surveillance, that we need more intrusion, that we need more expense of powers because it could have stopped an attack.

When it is made to appear as though not knowing everything about everyone is an existential crisis, then you feel that bending the rules is okay. Once people hate you for bending those rules, breaking them becomes a matter of survival.

Let's put it this way. The United States government has assembled a massive investigation team into me personally, into my work with the journalists, and they still have no idea what documents were provided to the journalist, what they have, what they don't have, because encryption works.

I do everything on the computer. TV is obsolete technology for me.

The new iPhone has encryption that protects the contents of the phone. This means if someone steals your phone - if a hacker or something images your phone - they can't read what's on the phone itself, they can't look at your pictures, they can't see the text messages you send, and so forth. But it does not stop law enforcement from tracking your movements via geolocation on the phone if they think you are involved in a kidnapping case, for example.

When people conceptualize a cyber-attack, they do tend to think about parts of the critical infrastructure like power plants, water supplies, and similar sort of heavy infrastructure, critical infrastructure areas. And they could be hit, as long as they're network connected, as long as they have some kind of systems that interact with them that could be manipulated from internet connection.

Much of what I saw in Geneva really disillusioned me about how my government functions and what its impact is in the world. I realised that I was part of something that was doing far more harm than good.