If you ask anybody at Cyber Command or look at any of the job listings for openings for their positions, you'll see that the one thing they don't prioritize is computer network defense. It's all about computer network attack and computer network exploitation at Cyber Command.

All the governments just want to have more power when it comes to economic espionage, diplomatic manipulation and political influence.

The only thing I fear is the harmful effects on my family, who I won't be able to help any more. That's what keeps me up at night.

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.

There are cyber threats out there, this is a dangerous world, and we have to be safe, we have to be secure no matter the cost.

The internet is the most complex system that humans have ever invented. And with every internet enabled operation that we've seen so far, all of these offensive operations, we see knock on effects. We see unintended consequences.

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.