mursitorhan, mursitorhan wrote > To sign a pdf multiple times itext needs a stamper in append mode. But > encryption operation In append mode throw exception. > Without trouble I am able sign and ecrypt a pdf for one signature because > I am creating signature setting append mode false. > Using adobe reader I can do this. How can achieve encryption with multiple > signature in itext?
What you say you want is impossible: If you have a PDF which already is signed multiple times (and as you do not say anything else I assume by means of digital signatures according to section 12.8 of ISO 32000-1 or derivates thereof) and then encrypt that PDF according to section 7.6, you automatically break those former signatures. Thus, what you proclaim you can do with Adobe Reader is something else. As you don't seem to know what you created in Adobe Reader, please provide a sample PDF processed as you proclaim for inspection. Regards, Michael -- View this message in context: http://itext-general.2136553.n4.nabble.com/how-to-encrypt-a-pdf-after-multiple-signature-tp4658313p4658317.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ 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
