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Subscribers to Adobe Acrobat Premium or Adobe Acrobat Pro DC can protect PDFs by setting a password. It can help you secure confidential information and restrict unauthorized access.
You cannot edit, fill & sign, compress, or export password-protected PDFs.
You can remove the password with desktop Acrobat if you know the original password.
There is no separate password for edit. If a user can open a file, they can edit the file.
Currently, Acrobat Reader mobile app does not support printing of password-protected PDFs.
Note: Setting a password for a file creates a password-protected copy of the file. It doesn’t protect or change the original file.