There are lots of ways to protect your ultra secret “eyes only”, top level clearance only data. Here’s Thanko’s answer. A pad lock on a usb drive.

Hey why not? If you have nosy co-workers or are just paranoid someone will find out about you moonlighting as a secret agent, it might work. Maybe. Okay, probably not. But it’s a neat idea. Maybe good for protecting regular data. Go for something stronger when hiding Top Secret files. Even a monkey could disassemble this thing.

[Akihabara]