Das geht auch mit den Acrobat-Bordmitteln.
Zitat aus der JavaScript-Reference:
"Security
Adding Security to PDF DocumentsEncrypting PDF Files Using Security Policies
It is possible to define a security policy for a PDF document. The policy can contain a list of
people who can open the document, restrictions limiting their ability to modify, print, or
copy the document, and an expiration date for the document after which it cannot be
opened.
There are two kinds of security policies: a custom policy is one created by a user and is
stored on a local computer, and a corporate policy is developed by an organization and
stored on a policy server such as LiveCycleΤΜ Policy Server®).
There are three types of custom policies. You may create policies for password security,
certificate security, and policies used on LiveCycle Policy Server. "
als Antwort auf: [#341546]