Hi, thank you for the quick answer. I would need this entry for a verifier which produces otherwise an exception! Why exactly would digital signatures in PDFs based on specs prior to v1.7 no longer considered to be safe?
best regards, Florian -----Ursprüngliche Nachricht----- Von: iText Info [mailto:i...@1t3xt.info] Gesendet: Dienstag, 27. Mai 2014 14:06 An: itext-questions@lists.sourceforge.net Betreff: Re: [iText-questions] put /ProcSet to /AP Dictionary Gruber, Florian (ext) schreef op 27/05/2014 12:12: > is it possible to put the /ProcSet Entry to the /AP dictionary at the > signature process with itextsharp? Digital signatures in PDFs based on specs prior to PDF 1.7 are no longer considered to be safe. Beginning with PDF 1.4, ProcSet is considered obsolete. It is deprecated in ISO-32000-1. I quote from section 14.2, entitled "Procedure Sets": <quote> Beginning with PDF 1.4, this feature is considered obsolete. For compatibility with existing conforming readers, conforming writers should continue to specify procedure sets (preferably, all of those listed in Table 314 unless it is known that fewer are needed). However, conforming readers should not depend on the correctness of this information. </quote> So... the question is not where it's possible to add the /ProcSet entry. The question is why you'd introduce a deprecated entry. Suppose that your answer is: "because I have a reader that depends on /ProcSet", then it is very unlikely that this reading is (a.) able to interpret the future-proof signature, and (b.) a conforming reader. ------------------------------------------------------------------------------ The best possible search technologies are now affordable for all companies. Download your FREE open source Enterprise Search Engine today! Our experts will assist you in its installation for $59/mo, no commitment. Test it for FREE on our Cloud platform anytime! http://pubads.g.doubleclick.net/gampad/clk?id=145328191&iu=/4140/ostg.clktrk _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions iText(R) is a registered trademark of 1T3XT BVBA. Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php ------------------------------------------------------------------------------ The best possible search technologies are now affordable for all companies. Download your FREE open source Enterprise Search Engine today! Our experts will assist you in its installation for $59/mo, no commitment. Test it for FREE on our Cloud platform anytime! http://pubads.g.doubleclick.net/gampad/clk?id=145328191&iu=/4140/ostg.clktrk _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions iText(R) is a registered trademark of 1T3XT BVBA. Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
