Trying to design a system-specific access control for PDF files. The overall flow of the system will look like this:
- A person downloads or receives a PDF and the access code to open it
- Once they use the access code on a computer, it is tied to their MAC/Motherboard/CPU serial so that they can't use the same code on a different system to open the file
I am open to using an online database for managing access codes and system serial mappings but need recommendations on the tools, libraries, and approaches to use to build the product.