If you don't use a certification signature, then you aren't stating any rules for modification - which is considered to mean "NO modifications". So if you modify the document after signature, then it's invalid. Clear?
If you wish to allow certain types of modifications after signing, then you need to start with a Certification signature that states it as such. Leonard On 5/17/13 11:30 AM, "twain" <ant.mari...@gmail.com> wrote: >I'll try to explain better my situation. > >About Michael doc: I never used certification signature but only approval >signature. >So I never set any level to prevent modification. > >About Leonard reply: the problem is that, even if I used a new revision, >Acrobat complains that the first signature is not valid. >And this happens only if I sign a signed pdf trying to modify something in >it. >If I sign a signed pdf without any change this problem doesn't occur. > >So I desume that revision, for approval signatures, doesn't allow to >modify >a signed pdf. >If you have a signed pdf you can only re-sign it without changes despite >of >revision. > >Right? > > > >-- >View this message in context: >http://itext-general.2136553.n4.nabble.com/New-revision-issues-tp4658282p4 >658290.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 ------------------------------------------------------------------------------ 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
