Protecting PDFs

I dont know if this has been posted before, i tried searching and couldn't find
much about it.

Yes, Up until recently I did this all time on my Electronic association's
website.

Create your PDF

then save to a specified folder you use to upload your website files from on
your computer.

Next open a Web design program such as DreamWeaver (for example) and open the
page you want the link to the PDF to be. The type at the appropriate place in
the document a Title then Highlight and add your link to the PDF.

Save the Page.

use a FTP program suchs as Interarchy (for example) and upload the pdf in the
directory named the same as the directory on the computer you saved it on.

Then save the updated page. with the link name (a html document) to its
appropriate Directory.

Then go to your website. see if you see the new reference and click on it in a
web browser such as as SeaMonkey(for example).

Not clear how that protects the PDF from saving, something I would
generally say was impossible.

You can set document security to protect against editing, but not all
products respect this. Before getting too hung up on protecting
against editing, remember that if a modified document is worth having,
someone can always make a new fake.