Japanese company Thanko caters to the most paranoiac among us with the USB PC lock. To protect your PC data, connect the USB transmitter part to your computer and keep the receiver in your pocket (or you can wear it proudly on your shirt). When you move more than two meters from your PC, the computer automatically ID-locks the window. Even if somebody pulls out the transmitter or you accidentally lose it, it will still ask you for your ID.
Via Japan Today.