How do you add a username password protection to a pdf file?

I have tried the Document/Security/Restrict Opening and Editing option but 
the only settings available are for Open and Permissions passwords.



I am trying to secure a pdf file but find that using the Restrict Opening 
and Editing password options it is still easy to remove the protection with 
password removal software.

Hi Chris,

You should check out the below DRM solutions (if you haven't already).
Acrobat and other PDF Creators/Editors, usually only allow you to add
Open and Permission passwords, as you've discovered.

Adobe LiveCycle Policy Server
http://www.adobe.com/products/server/policy/index.html

FileOpen Publisher
http://www.fileopen.com/product_publisher3.html

Lizard Safeguard
http://www.locklizard.com/pdf_security.htm

- Row.

Chris Lewis wrote:
> How do you add a username password protection to a pdf file?
>
> I have tried the Document/Security/Restrict Opening and Editing option but
> the only settings available are for Open and Permissions passwords.
>
> I am trying to secure a pdf file but find that using the Restrict Opening
> and Editing password options it is still easy to remove the protection with
> password removal software.