I'm an expert witness in a case that's in appeal about a guy who allegedly misappropriated source code from a major, major company - he actually worked there and then apparently they found it on his laptop later.

Some people think technology has the answers.

Then again, my case was all about the misappropriation of source code because I wanted to become the best hacker in the world and I enjoyed beating the security mechanisms.

So what I was essentially doing was, I compromised the confidentiality of their proprietary software to advance my agenda of becoming the best at breaking through the lock.

It was used for decades to describe talented computer enthusiasts, people whose skill at using computers to solve technical problems and puzzles was - and is - respected and admired by others possessing similar technical skills.

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

But a lot of businesses out there don't see the return on investment, they look at it as a liability, and until they can understand that proactive security actually returns, gives them a return on investment, it's still a hard sell for people.

Of course I'm sure half the people there hate me and half the people like me.

I made stupid decisions as a kid, or as a young adult, but I'm trying to be now, I'm trying to take this lemon and make lemonade.

So the ethic I was taught in school resulted in the path I chose in my life following school.

Back in my day, I would probe by hand. Now you can get commercial software that does the job for you.

Are hackers a threat? The degree of threat presented by any conduct, whether legal or illegal, depends on the actions and intent of the individual and the harm they cause.

I'm an expert witness in a case that's in appeal about a guy who allegedly misappropriated source code from a major, major company - he actually worked there and then apparently they found it on his laptop later.

As a young boy, I was taught in high school that hacking was cool.

Any type of operating system that I wanted to be able to hack, I basically compromised the source code, copied it over to the university because I didn't have enough space on my 200 megabyte hard drive.

We have problems with our physical security, operational security through to management.

My actions constituted pure hacking that resulted in relatively trivial expenses for the companies involved, despite the government's false claims.

I was pretty much the government's poster boy for what I had done.

Should we fear hackers? Intention is at the heart of this discussion.

The hacker mindset doesn't actually see what happens on the other side, to the victim.

All they need to do is to set up some website somewhere selling some bogus product at twenty percent of the normal market prices and people are going to be tricked into providing their credit card numbers.

I believe in having each device secured and monitoring each device, rather than just monitoring holistically on the network, and then responding in short enough time for damage control.

Security is always going to be a cat and mouse game because there'll be people out there that are hunting for the zero day award, you have people that don't have configuration management, don't have vulnerability management, don't have patch management.

A company can spend hundreds of thousands of dollars on firewalls, intrusion detection systems and encryption and other security technologies, but if an attacker can call one trusted person within the company, and that person complies, and if the attacker gets in, then all that money spent on technology is essentially wasted.

A log-in simulator is a program to trick some unknowing user into providing their user name and password.

A lot of companies are clueless, because they spend most or all of their security budget on high-tech security like fire walls and biometric authentication - which are important and needed - but then they don't train their people.

A lot of individuals out there carry a lot of proprietary information on their mobile devices, and they're not protected. It's a very target-rich environment.

At the end of the day, my goal was to be the best hacker.

Being on the run wasn't fun, but it was something I had to do. I was actually working in legitimate jobs. I wasn't living on people's credit cards. I was living like a character out of a movie. It was performance art.

Both social engineering and technical attacks played a big part in what I was able to do. It was a hybrid. I used social engineering when it was appropriate, and exploited technical vulnerabilities when it was appropriate.

Businesses should absolutely set aside funding in their budgets for security consultants. Unless there is an expert on staff, and there usually is not, it needs to be outsourced.

Choosing a hard-to-guess, but easy-to-remember password is important!

Companies spend millions of dollars on firewalls, encryption, and secure access devices and it's money wasted because none of these measures address the weakest link in the security chain: the people who use, administer, operate and account for computer systems that contain protected information.

Computer hacking really results in financial losses and hassles. The objectives of terrorist groups are more serious. That is not to say that cyber groups can't access a telephone switch in Manhattan on a day like 9/11, shut it down, and therefore cause more casualties.

For the average home-user, anti-virus software is a must.

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

Hackers are becoming more sophisticated in conjuring up new ways to hijack your system by exploiting technical vulnerabilities or human nature. Don't become the next victim of unscrupulous cyberspace intruders.

Hackers are breaking the systems for profit. Before, it was about intellectual curiosity and pursuit of knowledge and thrill, and now hacking is big business.

Hacking is exploiting security controls either in a technical, physical or a human-based element.

Hacking was the only entertainment that would occupy my mind - like a huge video game, but with real consequences. I could have evaded the FBI a lot longer if I had been able to control my passion for hacking.

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.

I characterize myself as a retired hacker. I'm applying what I know to improve security at companies.

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

I could pose as a Yahoo rep claiming that there's been some sort of fault, and somebody else is getting your e-mail, and we're going to have to remove your account and reinstall it. So what we'll do is reset the current password that you have - and by the way, what is it?

I did get a huge endorphin rush when I was able to crack a system because it was like a video game.

I don't condone anyone causing damage in my name, or doing anything malicious in support of my plight. There are more productive ways to help me. As a hacker myself, I never intentionally damaged anything.

I don't know the capabilities of our enemies. But I found it quite easy to circumvent security at certain phone companies throughout the United States. So if an inquisitive kid can do it, why can't a cyberterrorist do it?

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.

I get hired to hack into computers now and sometimes it's actually easier than it was years ago.