So I have a website I would like to make that would essentially be selling files. For the sake of discussion let's say that these files are like the raw text of a book. If somebody buys a file from my site, there really isn't anything preventing them from sharing that unlimited amounts of times with their neighbor or whatever.
I know that the music industry has suffered from this type of thing for years, so there may not be an easy solution, but what could I do to try and limit the use of that text file to just one person?
Is there any type of encryption or password verification that would help me solve this problem? Or do I just have to cope with the fact that it's 2010 and nobody will pay for anything they can find for free on the web?