At computer security courses in the early 2000s told stories

In those times, when the "masking show" came to the offices and took servers and PCs, the destruction of information was less evil than the deadline for its content :)

The set "2C Accounting" (later, in the internet did not find such a complex, maybe it was a joke name). In the body of the PC is mounted a set of interruptor and electromagnetic coils. By a combination of keys, the system provided a group of impulses that wiped the hard disk. Uninterruptor in case of switching off the lights before the visit of "masks". There was another "trick", a check was attached to the table on the truss. If you were not in place or you could not put your hands on the keyboard, then there was a chance that when the system unit was raised it would not be noticed and the check would bring the complex into action.

According to the narrator, he saw another security system, a guard with a gun was placed in the server. In the case of the visit of uninvited guests, a signal from the guard post was provided with a secret button, a red light was lit. After that, the guard shot the disk massive. It is reliable :) But how can I imagine that poor guy sitting in a shift and looking at the lamp in a dark, swirling, cold server room? I wonder at what time the glowing lights started :)