I encrypted a document using my self-signed Digital ID (pfx) to prevent printing or copying from it. When I open the PDF, it asks me for my Digital ID password and the PDF says "This document is encrypting using your certificate" in the security tab. Unfortunately, when I tried to remove the security to make some changes, I get an error message sying "You are not authorized to change the security settings of this document".
If I cannot change the security on my own documents, who can? Did I miss a crucial step in the process somewhere?
Unfortunately I do not have a copy of this specific document (that was the idea behind protecting it in the first place) and hope someone here can help me solve the problem.