I could have evaded the FBI a lot longer if I had been able to control my passion for hacking.

I saw myself as an electronic joy rider.

Garbage can provide important details for hackers: names, telephone numbers, a company's internal jargon.

I can go into LinkedIn and search for network engineers and come up with a list of great spear-phishing targets because they usually have administrator rights over the network. Then I go onto Twitter or Facebook and trick them into doing something, and I have privileged access.

Steve Wozniak and Steve Jobs founded Apple Inc, which set the computing world on its ear with the Macintosh in 1984.

I use Mac. Not because it's more secure than everything else - because it is actually less secure than Windows - but I use it because it is still under the radar. People who write malicious code want the greatest return on their investment, so they target Windows systems. I still work with Windows in virtual machines.

I get hired by companies to hack into their systems and break into their physical facilities to find security holes. Our success rate is 100%; we've always found a hole.