Passwords are usually used to protect documents from being opened or edited. There are two types of passwords in PDF Plus: The Document Open Password and Permissions Password.
The Document Open Password is just that – a password required to open a PDF document. However, it can also restrict editing or printing functions.
A Permissions password gives users permission to change the security settings of a PDF document. When you open a document using the Permissions password, you won’t have to enter it again when changing security settings.
PDF Plus supports 128-bit and 128-bit AES (Advanced Encryption Standard) security standards.
Note: There is no way to recover lost passwords. If possible, keep a backup copy of the document that is not password-protected.
To change password security settings for a document:
- Choose Document > Document Properties, or click the button at the top of the vertical scrolling bar to select Document Properties.
- Click the Security tab, and then click Change Settings. Click Show Details to view more detailed Security settings.
- If prompted, type the Permissions password that lets you adjust security settings. If you do not know the password, contact the author of the PDF document.
- In the Password Security dialog box, set the security options as desired.
To remove password security settings from a document:
- Go to Document > Document Properties, or click the button at the top of the vertical scrolling bar to select Document Properties.
- Click the Security tab, and then choose No Security from the Security Method menu.
- When prompted, specify the Permissions password, and then click OK. If you don’t know the Permissions password, contact the author of the document.