User/owner passwordTo accept PDF security please make sure the following radio button is enabled:
There could be different types of password - user password and owner password. To accept the password do not forget to enable the radio button near the needed one.
Owner password. It is the master password of the PDF document. It allows full access to the document: reading, editing, printing and changing security settings.
To load settings you saved before click Load settings from file button.
To save current settings click Save settings to file button.
As soon as you customized the settings you wanted click Apply to make your new settings be applied.