The "security code" installed on this NES controller flash storage mod isn't going to keep anyone from accessing the files inside, but that's not really the point:

You see, the code in this case is one of the most well-known codes in all of video game history. The Konami Code. Hell, even God knows it.

Again, there's no real security here, but in any event it's miles ahead of what most people use to secure things that are really important to them. [8Bit Fix - Thanks, Gusto]