By leaning on companies, by leaning on infrastructure providers, by leaning on researchers, graduate students, post-docs, even undergrads, to look at the challenges having an untrusted internet, where we have to put our communications on wires that are owned by a phone company that we can't trust, that's working in collaboration with a government that we can't trust, in areas around the world, we can restructure that communications fabric in a way that it's encrypted.

We decentralise the ability to decide the level of publicity that's attached to any of our communications.

We've already seen, in practically every country around the world where these issues have been covered, that the general public has recoiled at the ideology behind these programs.

I'm ultimately satisfied that we know a little bit more about how the world really works.

When we look at the full-on mass surveillance watching everyone in the country, in the United States, it doesn't work. It didn't stop the attacks in Boston. The marathon bombings. Where again, we knew who these individuals were. It didn't stop the Underwear Bomber, whose father walked into an embassy and warned us about this individual before he walked onto an airplane. And it's not going to stop the next attacks either. Because again, they're not public safety programmes. They're spying programmes. They are valuable for spying.

While the US Constitution marks these programs as illegal, my government argues that secret court rulings, which the world is not permitted to see, somehow legitimize an illegal affair. These rulings simply corrupt the most basic notion of justice - that it must be seen to be done. The immoral cannot be made moral through the use of secret law.

I have had many opportunities to flee HK, but I would rather stay and fight the United States government in the courts, because I have faith in Hong Kong's rule of law.