[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: RE: Fw: [dss-x] Visual Signatures profile
> The first three items in your simple approach are fine - nothing > "problematic" there. Hey, good start ;-) > The fourth, however, is the one that starts to introduce some > complexity. In order to "lock down" a PDF after signing, you need > to use what it called a "certifying signature" along with "MDP" > (modification, detection and prevention) rules. > Doing so, of course, will prevent any future signing - > which would be problematic if the form really requires parallel > or sequential sigs. However, MDP rights allow you to prevent all > changes EXCEPT other signing - so perhaps that's the route to > consider... Hmm, I'm not quite sure what you are talking about. I just meant that this profile doesn't do anything more than filling out the signature field, nothing fancy. No update of visible fields with e.g. signing time nor inserting a gold shimmering 'seal' icon. I don't intend to apply any right management functions regarding future changes of the document. For me the signature is sufficient ! Greetings Andreas > > -----Original Message----- > From: Andreas Kuehne [mailto:kuehne@trustable.de] > Sent: Tuesday, April 01, 2008 5:28 AM > To: Leonard Rosenthol > Cc: dss@lists.oasis-open.org > Subject: Re: Fw: [dss-x] Visual Signatures profile > > Hi Leonard ! > > Konrad said something very important yesterday : > > 'Think of requirements, not of existing solutions !' > > I hope I remember it correctly ... but it's true anyway. 2D barcodes > are > funny stuff to impress my kids and colleagues, but our real use case is > : Mass signing of PDF invoice documents. That's not a tricky > requirement > at all, but I just can't do it using DSS right now ! > > So I would like to go for a signing profile for PDF documents starting > with the core's successful keep-it-simple approach in mind : > > - One signature at a time > - Pre-configured signature field included in the document > - DSS's signature placement enhanced to be a pointer into a PDF doc > - No update of the PDF beyond the signature field > > Same for Verification. I have no experience with timestamps in PDFs, > maybe the simple signature approach will fit ?? > > This would introduce a new profile with focus on PDF as a signature > container format, independent from the visual signature efforts. Does > this makes sense to you ? > > More sophisticated profiles may aggregate this functionality, but > that's > not my use case. > > > Opinions welcome > > Andreas > > ___________________________________________________ Andreas Kühne phone: +49 177 293 24 97 mailto: kuehne@trustable.de Trustable Ltd. Niederlassung Deutschland Ströverstr. 18 - 59427 Unna Amtsgericht Hamm HRB 5868 Directors Andreas Kühne Heiko Veit Company UK Company No: 5218868 Registered in England and Wales
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]