I have a template PDF document which is read at runtime. Some form fields are pre-filled for the end user and some other PDFs are appended and saved out as a different document. According to Adobe, the Extended Features settings will be lost when the file is changed. I was hoping that I could reset these settings on the new file by using the DocumentPrivilige and PdfFileSecurity class. So far, nothing has worked. Has anyone had similar problems? All end users will view the PDF using Adobe Reader and will want to complete the form fields for future reference.
I have tested the issue and I am able to notice the same problem. We need to investigate if we can support the feature to reset the Extended Features settings. Soon you will be updated with the status of correction.
After careful investigation, we found that this kind of rights cannot be supported by our products. In order to protect such documents, Adobe combined the rights with file contents through a digest algorithm. Once the document is changed, the "fill and save" right turns to be invalid. Since the digest algorithm is kept secretly by Adobe, it is only possible with software form Adobe to fulfill your requirement. You won't find any other product that allows you to do it.
Honestly, this problem has been asked for many times. But until now, we haven't find any ideas to overcome it.
