[plug] M$ again - Digital rights in Office

[James Devenish]

In message <20030903043640.GA4862 at mail.guild.uwa.edu.au>
on Wed, Sep 03, 2003 at 12:36:41PM +0800, James Devenish wrote:
> With PDF, the rights restrictions are superficial unless the document is
> encrypted.

Or rather: if there is encryption, you must decrypt the document by
using the correct password. If you know the encryption password, or the
document has a password but is not encrypted, or the document has no
password, then the rights restrictions are superficial. In essence: if
you can display a document then you can print it, too, regardless of
whether the authors wants you to. So, if you want to block copying,
printing, editing and resaving, or your want to apply an expiration
date, then you need to involve secret information such as passwords.