Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I found this video from adobe how to protect your document. I am using latest Adobe Acrobat Reader 9. Note I am trying to put password inside the reader itself. If I go to

File > properties > security

everything is simply disabled. If I go to

help > plugins

There is a plugin for security but I can't seem to find it or install it to put that feature in. Does anyone know regarding Adobe Acrobat Reader only. If it can't be achieved with Reader alone, than other help will be appreciated.

share|improve this question

Acrobat Reader can only show you PDF files, editing is not available. To protect a PDF file you need Adobe Acrobat Pro.
I'm not sure but it might be also available in third party tools (more likely in commercial ones).

share|improve this answer
But even security feature can't be added through a plugins? – Dave Feb 16 '12 at 14:35
@Dave: No, Adobe Reader is only for viewing. – Rainer Feb 16 '12 at 14:42

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.