About certificate security

One of the ways to protect PDF documents against unauthorized access is to specify certificate security schemes for them. Such schemes can be stored in your system.

To apply one to a PDF document or create a new one, open the Security Panel.

If you do not see this tool, right-click in an empty area of the Panel bar and select it.

Certificate security schemes can use different encryption algorithms to encrypt different parts of the PDF document content. For detail, see Security Panel.