[RESOLVED] Password Protecting PDF for Mag Subscription

[Nibinaear]

I'm producing a magazine website and at the very least the company are looking at having user registration, and from there letting the registered users only access an online pdf of the magazine.

Uploading the pdf is easy, but how do you only let registered users see the pdf file and not everyone?

Note: I don't want to just password protect the pdf, I want to allow only certain users to register and download it, I'm sure password protection of pdfs is possible at the pdf level but that's not what I want.

The other option is to find a way of getting from the pdf to a set of webpages containing the same content as the pdf of the magazine. Obviously the printed form is different to the website form. I've seen a good example of it here:

http://www.nxtbook.com/dal/graduateprospects/grad27/

Daniel

Edited
There seems to be some confusion about what I'm talking about, so I'll just clarify.

I have an online magazine which is called magazine.pdf. Each month this is replaced. I want to restrict the pdf using sessions or cookies so that only registred members can access it. This is a problem because anyone can access a pdf once they know the link to it and this would allow them to circumvent the login process. To avoid this I need a method of protecting the pdf so that only registered members can login and see it.