Short version: It can't be done, so don't bother.
Long version: What you're trying to do has been tried ever since the invention of the floppy disc. They call it "copy protection" or more recently "DRM", and it does not work, never has, and never can. Trying to make bytes that are not copyable is like trying to make water that's not wet. This doesn't keep people from putting tons of research into it, generally as an anti-piracy scheme.
Microsoft, who spends more money on R&D each quarter than many of us will see in our entire lives, put a huge amount of work into it for Windows 8. A working crack was available before Windows 8 was even released to the public. If they can't make it work, with all those resources available, do you really think you even have the slightest chance?
Copying stuff that "shouldn't" be copied is not a technology issue; it's a social issue. You and the person doing the copying disagree on whether or not it should be copied. There's a well-established system for dealing with social issues of this sort: contract law. Get them to sign a contract that places liability on them if they use it in certain ways, and that will do more than all the technical attempts to make bytes un-copyable in all the world.