Social engineering is using manipulation, influence and deception to get a person, a trusted insider within an organization, to comply with a request, and the request is usually to release information or to perform some sort of action item that benefits that attacker.

When an attacker fails with one person, they often go to another person. The key is to report the attack to other departments. Workers should know to act like they are going along with what the hacker wants and take copious notes so the company will know what the hacker is trying to find.

The perfect PIN is not four digits and not associated with your life, like an old telephone number. It's something easy for you to remember and hard for other people to guess.

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

I think it goes back to my high school days. In computer class, the first assignment was to write a program to print the first 100 Fibonacci numbers. Instead, I wrote a program that would steal passwords of students. My teacher gave me an A.

If you go to a coffee shop or at the airport, and you're using open wireless, I would use a VPN service that you could subscribe for 10 bucks a month. Everything is encrypted in an encryption tunnel, so a hacker cannot tamper with your connection.

It doesn't work the same way everywhere. The Americans are the most gullible, because they don't like to deny co-workers' requests. People in the former Soviet bloc countries are less trusting, perhaps because of their previous experiences with their countries' secret services.