[Narrator] This is a SentrySafe model MS0100. It's fire resistant and has a dial lock with a million possible combinations. And this is Nathan Seidle. Nathan, are you a safecracker? I'm not a ...

A few weeks ago, renowned security expert / hacker / entrepreneur Samy Kamkar detailed a method that can be used to crack any Master Combination Lock by hand in just eight tries or less. Now, he's ...