Is it possible to make a krnl type key system for my roblox script?

For my script, I want it so that the key is in a Pastebin so the GitHub can't just get forked and no one ever has to use my current system again. I want it so that I can have a random key every time someone tries to generate it (through a linkvertise.) like krnls key system but with my script.

I fully understand this is a very hard thing to understand so go ahead and ignore if you don't know what im talking about.