Sure you can. The first signature covers the original document while the second covers the original PLUS the additions. Assuming no other changes other than signing, both should be valid.
If the first signature is a certifying signature, then you could potentially have other operations as well between signatures and they could both still be valid. Leonard -----Original Message----- From: Paulo Soares [mailto:[email protected]] Sent: Wednesday, July 22, 2009 2:06 PM To: Post all your questions about iText here Subject: Re: [iText-questions] How to check differences between signed revisions You can't have two valid signatures covering the whole document. Show us the PDF. Paulo ----- Original Message ----- From: "Emilio Oca" <[email protected]> To: <[email protected]> Sent: Wednesday, July 22, 2009 6:41 PM Subject: [iText-questions] How to check differences between signed revisions Could someone explain me (or point me where to find) how to check if differents signatures on a document where made over differents contents? I am trying to check if a document containing acrofields signed for first time where later modified when signed again. Both signatures seems to be valid and cover the hole document. Best Emilio ------------------------------------------------------------------------------ _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://www.1t3xt.com/docs/book.php Check the site with examples before you ask questions: http://www.1t3xt.info/examples/ You can also search the keywords list: http://1t3xt.info/tutorials/keywords/ ------------------------------------------------------------------------------ _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://www.1t3xt.com/docs/book.php Check the site with examples before you ask questions: http://www.1t3xt.info/examples/ You can also search the keywords list: http://1t3xt.info/tutorials/keywords/
