A PDF user password is the password used to restrict the opening of a PDF file
. In Adobe Acrobat, the PDF user password is called the document open password
PDF user passwords are are not easily hacked but there are a few PDF password recovery tools that can do it via brute-force attack, given enough time.
A PDF user password only restricts the opening of a PDF file. PDF owner passwords are used to provide document restrictions in PDF files.
Also Known As: PDF open password, PDF document open password
Examples: "The secret project I was working on was for my eyes only so I set a 24-character user password on the PDF file. No one is getting in there!"