On Dec 20, 2010, at 6:18 PM, Ludovic Rousseau wrote:
> Le 19 décembre 2010 22:03, Jean-Michel Pouré - GOOZE
> <[hidden email]> a écrit :
>> Dear Friends,
>> I am trying to find a Free software to sign a PDF document, but I am
>> stuck! Any solution at hand?
> GnuPG  using gnupg-pkcs11 ?
> What is specific to a PDF document instead of any file type?
PDF has the possibility to embed signatures into the PDF, so that it is integrated and verifiable with Adobe Reader.
PGP (and several xades implementations in EU) either create standalone signatures or sign "envelopes" or "containers" (like OpenOffice XML zip containers)
Jean-Michel, It seems you have not checked OpenSC wiki ?