How else can I check the user for a program?
<p>Currently, my friend has a program that checks the users Windows CD-Key and then it goes  through a one way encryption. He, then, adds that new generated number to the program for checking purposes and then he compiles it and then he sends it off to the client. Is there a better way to keep the program from being shared utilizing PHP somehow instead of his current method while not using a login system of any kind.</p>
