On Monday, March 19, 2012, at 16:41 Mojca Miklavec wrote:
> I'm replying off-list. I think that this might be on the list of
> forbidden features (one would have to pay to adobe to be able to allow
> signing document with TeX).

> Mojca

> On Mon, Mar 19, 2012 at 10:27, Andreas Schneider wrote:
>> Hello,
>>
>> since  ConTeXt  supports  form  fields  in  PDFs, I wonder whether the
>> fields  for  digital  signatures are available as well. If not, please
>> consider this a feature request/wish :-)

> I'm not sure about it, but I'm tempted to believe that digitally
> signing PDFs might be one of "forbidden" functionality that requires
> you to buy a licence for Acrobat. Martin Schröder usually posts this
> link:
>     http://en.wikipedia.org/wiki/Adobe_LiveCycle_Reader_Extensions

> I have found this article, but I'm not sure if it is really legal:
>    
> http://www.codeproject.com/Articles/14488/E-signing-PDF-documents-with-iTextSharp

> Maybe we need a FAQ entry about PDF features somewhere on wiki (or at
> any other place).

> Mojca

That's  too  bad,  although I can see Adobe's reasoning. I thought/was
hoping  that  it  was  a  simply  not-yet-implemented  feature and not
something  Adobe Acrobat and Adobe Reader specific. Well, it was worth
a shot.

Anyway for signing PDFs myself I still use and prefer JSignPDF:
http://jsignpdf.sourceforge.net/

That  is really neat and supports a lot of very helpful features (like
visible  signatures).  It's  just that it isn't a solution for general
forms  that  others should sign, since not all of them are technically
versed or willing to install some third party program. That would have
been a good use case for ready-made PDF forms with signature fields.

Thanks for your answer!

-- 
Best Regards,
Andreas