While it would be nice for gnupdf to someday be able to do this, I will point 
out that there are a number of non-cost (free) tools including Adobe Reader 
that can verify PDF signatures AS WELL AS open source (free) libraries and 
tools such as iText that can do so as well.

Leonard

-----Original Message-----
From: pdf-devel-bounces+lrosenth=adobe....@gnu.org 
[mailto:pdf-devel-bounces+lrosenth=adobe....@gnu.org] On Behalf Of Krzysztof 
Zelechowski
Sent: Wednesday, January 26, 2011 9:38 PM
To: pdf-devel@gnu.org
Subject: [pdf-devel] wish: verify signed PDF documents

There is no free utility to verify signed PDF documents AFAICT.  Please 
consider implementing one.
Best regards,
Chris


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