paranoid much? If this is a real concern, why wipe your whole box? Just store your sensitive information online and scrub it before you leave? If you really rea

paranoid much? If this is a real concern, why wipe your whole box? Just store your sensitive information online and scrub it before you leave? If you really really must secure the entire system, then create a image of it an upload it (S3 or whatever). Keep a second clean image for use when crossing the border. Swapping images is significantly simpler than re-installing from scratch every time.