Cryptography is the ultimate form of non-violent direct action.

We don't have sources who are dissidents on other sources. Should they come forward, that would be a tricky situation for us, but we're presumably acting in such a way that people feel morally compelled to continue our mission, not to screw it up.

The whole universe or the structure that perceives it is a worthy opponent, but try as I may I can not escape the sound of suffering. Perhaps as an old man I will take great comfort in pottering around in a lab and gently talking to students in the summer evening and will accept suffering with insouciance. But not now; men in their prime, if they have convictions are tasked to act on them.

In my situation, frankly, I'm a bit institutionalised - this [the embassy] is the world .. it's visually the world [for me].

Facebook in particular is the most appalling spying machine that has ever been invented. Here we have the world's most comprehensive database about people, their relationships, their names, their addresses, their locations and the communications with each other, their relatives, all sitting within the United States, all accessible to US intelligence. Facebook, Google, Yahoo.. all these major US organizations have built-in interfaces for US intelligence. It's not a matter of serving a subpoena. They have an interface that they have developed for US intelligence to use.

The one real irritant is that my young children - they also adapt. They adapt to being without their father. That's a hard, hard adaption which they didn't ask for. I worry about them; I worry about their mother.

My family has had to move and change their name and have been subject to threats from right wing blogs calling for my son, for example, to be killed to get at me.