One thing we do here -- just a variant -- for a major Pharmaceutical is
simply create a system that requires a login to start and also tracks
which files a user views or downloads when logged in. Anyone can share
usernames / passwords with other people, so you can't protect against
that, but they all have employment or consulting contracts that
restrict that type of thing as best they can...

So, once a user logs in, all the PDFs and PPT files are available via a
URL that includes their user name. Then, simple web reports track
"who" downloaded "what" and "when".

You can't easily create files that only some people can read, but we
track them this way -- you can create files that require specific
information to read, but there's no perfect authentication and those
that are strong cost a lot.

You can create encrypted PDF files, but people can decrypt them... you
prevent them from doing that by applying the DMCA, so it's against the
law to break the encryption :-)

David


On Nov 29, 2003, at 4:56 PM, Phil Richards wrote:

> I have successfully implemented Scott Hoge's password protected members
> only page access.  Now I need to know how to protect Adobe PDF files so
> they can only be read by members that have signed in with a password. 
> I
> can, of course, limit access to the links to the PDF files, but the PDF
> files themselves are stored in accessible locations.  I don't create
> the
> PDF files myself, so I don't know if there is a way to switch this on
> in
> the Adobe converter.  Any suggestions?
>
> Phil Richards
> Westchester Chordsmen
>
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