(off-topic) concatenating signed PDF documents

(off-topic) concatenating signed PDF documents

[Pablo Rodriguez]

Dear list,

I have a question for users with more knowledge on digitally-signed PDF
documents.

Is it possible to concatenate PDF documents (each signed by a different
certificate [by a different person]) into a single PDF document without
invalidating any signature?

I tried to join all PDF files with pdftk, but digital signatures in the
resulting file were invalid.

I guess that I’m trying something impossible, but I’ll really appreciate
the confirmation from somebody with experience in digital-signed PDF
documents.

Many thanks for your help,

Pablo
-- 
http://www.ousia.tk
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Re: (off-topic) concatenating signed PDF documents

[Henri Menke]

»If you have PDF documents digitally signed the only way to combine them preserving their signatures is to create a PDF Portfolio with Acrobat Pro.«

Source:
https://answers.acrobatusers.com/How-do-I-combine-multiple-files-to-one-PDF-when-one-or-more-files-has-been-digitally-signed-through-Docusign-q127556.aspx

On 03/08/2017 06:37 PM, Pablo Rodriguez wrote:
> Dear list,
> 
> I have a question for users with more knowledge on digitally-signed PDF
> documents.
> 
> Is it possible to concatenate PDF documents (each signed by a different
> certificate [by a different person]) into a single PDF document without
> invalidating any signature?
> 
> I tried to join all PDF files with pdftk, but digital signatures in the
> resulting file were invalid.
> 
> I guess that I’m trying something impossible, but I’ll really appreciate
> the confirmation from somebody with experience in digital-signed PDF
> documents.
> 
> Many thanks for your help,
> 
> Pablo
> 

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: (off-topic) concatenating signed PDF documents

[Pablo Rodriguez]

On 03/08/2017 07:35 PM, Henri Menke wrote:
> »If you have PDF documents digitally signed the only way to combine
> them preserving their signatures is to create a PDF Portfolio with
> Acrobat Pro.«

Many thanks for your reply, Henri.

I saw that a way is attaching the PDF files to another PDF document.

My understanding of PDF Portfoliios is that they are only a fancy way of
presenting the attached files in the PDF.

I’m afraid that adding attachments to a PDF file would make life too
hard for the recipients of the file.

Many thanks for your help,

Pablo
-- 
http://www.ousia.tk
___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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