applescript programmer

I have a standalone applescript program that inputs a password into the open password field of a pdf file. I also have a .app application ([login to view URL]) that grabs the macintosh end-user's computer serial number and requires a corresponding unique identifier to operate. I own the [login to view URL] file that produces the unique identifier for the CLIENT.app. The goal: to lock the pdf file down to the end-user's computer - as follows: The Programming Work: The standalone applescript program needs the following statement programmed into it: "This file can only be launched by CLIENT.app." [login to view URL], on the other hand, is launched when I supply the unique identifier and is manually inputted by the end-user. Once the unique identifier is inputted into [login to view URL]: (a) [login to view URL] only operates on that single machine - and does not operate on any other (b) [login to view URL] launches the applescript program which, in turn, launches (and places the open password into) my pdf file.