I'm just about old enough (no need to ask how old) to remember the moment when the IT security sector evolved to fully appreciate the human factors involved in both the security and threat landscape that lay ahead. Understanding that people, their faith in one and other, and their ability to work together, still plays such a vital role in the success of technology innovation is comforting, moreover it's reassuringly human.

If you are lucky enough to have never been a victim of cyber crime, or had your system at work affected by an outside (or inside) attack, then the chances are that the people in this list have had something to do with the companies and products behind what prevented that happening.