Hello. I have a problem with encrypting signed pdf. Currently we store signed pdf in our database and need to sent encrypted version over the net, but encrypting it using PDFReader and PdfStamper seems to break certificates existing(adobe reader says they are not valid). Is there some workaround for that? I also tried to sign those pdfs again during encryption but i end with pdf with 2 certificates. The new one which is valid and old one which is broken(maybe there is some way to delete this one?)
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