Protect Document With Password. But while it does give a sense of security is it truly enough to protect your documents from copying and misusing. If the document has a Document Open password click OK to remove it from the document.
There are multiple ways to password protect your sensitive information. You can encrypt a document with a password by going to File Info Protect Document and choosing. PDF is still the most common file format and password protection is the most common approach to keeping PDF content safe.
Open the password-protected PDF file in the Adobe Acrobat software.
To remove password encryption from the document open the document and enter the password in the Password box. In theory once you lock your PDF from editing and set a password to protect it your content is safe. To assign a password to the document so that users who know the password can remove the protection and work on the document type a password in the Enter new password optional box and then confirm the password. This will create a new PDF file that can be easily opened.