Is it possible to set security to PDF which is converted from image?

and you can make your PDF encrypted:

1. Launch A-PDF Image to PDF, add images;

2. Choose size for output quality or customize output quality by yourself; 3. Click " Setting" button and enter setting interface, add metadata such as title, author and keywords);

4. Select "Security" option, enable "Add Security" and set "Document Open Password". And you can also use a password to restrict permissions for changing, copying, or printing;

5. Save settings and build PDF from images.