I used to know of a security system for usb flash drives and pretty much any portable storage.
It used auto-run and a batch file to automatically send an email containing the IP address of any computer that it is plugged into(Except computers in witch you say are ok)
This way, if your flash drive is stolen and used on a foreign computer it will send you an email with the IP address of whoever stole it.
You can use their IP address to locate their location and/or report them to the police.
Unfouruanetly I cannot find the files anywhere on the internet.
If you know what im talking about and perhaps have a link to the files, please post it. Thank you.