They call it a “portable Fort Knox” and it is definitely not your typical flash drive. A new gadget available from Black Box Innovations delivers the ultimate in USB lockdown with the Personal Pocket Safe, a pin-protected thumb drive with “military grade” encryption that features preloaded software allowing users to safely enter, organize and secure important information. Pocket Safe, which retails for about $60, also has an automatic “lock out” feature that shuts down the device when it detects foul play.