Re: FLOSS support for signed PDFs

[Celejar <celejar@gmail.com>]

On Sun, 30 Sep 2007 20:01:01 -0500
John Hasler <jhasler@debian.org> wrote:

> Celejar writes:
> > A financial institution refused to enable electronic delivery unless it
> > detected Acrobat Reader installed on my system.
> 
> How are they doing this detection?  Could you spoof it?

I don't know.

> > [Our] statements are created using Adobe Acrobat software and a digital
> > signature is added for security purposes.  As the Adobe Acrobat Reader is
> > currently the only PDF reader that fully supports digitally signed PDF
> > files, this software is required to ensure that the document is genuine.
> 
> <http://www.secardeo.com/Trusted_E-Business/Digital_Signatures/PDF-FAQ/pdf-faq.html>
> 
> pdfinfo _might_ get you the signature if you want to verify it (but you'd
> have to get their certificate somehow).
> 
> Or perhaps they are using PGP:
> <https://www.veridis.com/philip-zimmermann/philip-zimmermann-corner/digitally-signed-pdf-files-now-with-openpgp-keys-%28by-philip-zimmermann%29.htm>
> 
> This looks interesting:
> <http://homes.esat.kuleuven.be/~decockd/wiki/bin/view.cgi/HowTos/SignatureVerification>

Thanks for the links; I will take a look at them.

> John Hasler

Celejar
--
mailmin.sourceforge.net - remote access via secure (OpenPGP) email
ssuds.sourceforge.net - A Simple Sudoku Solver and Generator