Nope, if it's one person, it's gotta be Szabo. Only person in the world who wouldn't cite his work would be himself. (If it's more than one person, of course it could include Len.)
I believe this means that the part's computer has the vehicle's VIN loaded into it with a computer that can only be purchased/used by a certified technician. If he was to buy a new part, it would have a blank VIN; and if he pulled one from a junker, it would have that car's VIN.
(edit: should also say, I think a VIN mismatch would cause the ECU to refuse to work with that part and shut down)