We have to argue forcefully and demand that the government recognise that these programmes do not prevent - mass surveillance does not prevent acts of terrorism.

The new iPhone encryption does not stop them from accessing copies of your pictures or whatever that are uploaded to, for example, Apple's cloud service, which are still legally accessible because those are not encrypted. It only protects what's physically on the phone.

We have a media that goes along with the government by parroting phrases intended to provoke a certain emotional response - for example, "national security." Everyone says "national security" to the point that we now must use the term "national security." But it is not national security that they're concerned with; it is state security. And that's a key distinction.

When governments go too far to punish people for actions that are dissent rather than a real threat to the nation, they risk delegitimizing not just their systems of justice, but the legitimacy of the government itself. Because when they bring political charges against people for acts that were clearly at least intended to work in the public interest, they deny them the opportunity to mount a public-interest defense.

We are a representative democracy. But how did we get there? We got there through direct action. And that's enshrined in our Constitution and in our values.

How do we preserve our civil rights, our traditions as a liberal democracy, in a time when government power is expanding and is more and more difficult to check?

By creating a self-policing, self-reporting, sort of self-monitoring culture through law, through statute, and imposing that on the academic world, I think not only are we losing a significant measure of freedom in academic traditions and in our civil society, but we're actually making ourselves less competitive with every other country around the world that does not do that. Because that's where researchers are going to go and that's where academics are going to go. And ultimately, that's where breakthroughs are going to occur.