need to protect USB drives (flash drive or pen drive) which runs in USB itself.
the program should have options.....
Protect-copy (enable/disable): person should not be able to copy data from USB
Paste allowed (enable/disable): A person can paste external file in USB
Periodic encryption: Particular file gets encrypted (so that it stop working) after specified period of time. Time option can be in hours or days.
Reset: Periodic encryption.
USB drives are for distribution.