My hacking involved pretty much exploring computer systems and obtaining access to the source code of telecommunication systems and computer operating systems, because my goal was to learn all I can about security vulnerabilities within these systems.

I started with CB radio, ham radio, and eventually went into computers. And I was just fascinated with it. And back then, when I was in school, computer hacking was encouraged. It was an encouraged activity. In fact, I remember one of the projects my teacher gave me was writing a log-in simulator.

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

Kevin Mitnick Quotes