I know how to password protect a pdf using acrobat. But I would like to create my custom cover page that would appear with the empty password field.
How can I do this?
Thanks in advance!
Post your question in the forum for Acrobat.
Don't bother - the answer is you can't.
Documents cannot alter any of the system dialogs, and it's not possible to protect only certain pages within a file, so you can't display *anything* on the screen until the "open" password has been entered.
The only thing you could do is attach an unsecured PDF to another (cover sheet) PDF, and secure that one using the "attachments only" option, which is how the PDF Security Envelope system works. The problem of course is that once the user has opened the attachment they can save it as an unsecured standalone file.