Use stegonographie
( encrypt your files and hide them in a fully functional music file or a picture)
so noone will know there are encrypted files on that usb.
I suggest Drivecrypt for that:
http://www.securstar.com
Quote:
6. Hide data into music files ( Steganography » read more)
Using special so called "Steganographic" functionalities, DRIVECRYPT allows you to hide all your sensitive information into music files. Just authorized users will be able to access secret information, anyone else will only find harmless music on the computer?
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