0 Replies Latest reply on May 14, 2009 7:02 AM by CharlesFr

    Problems validating a digitally signed PDF


      Hi. I am using some 3rd party programs to digitally sign and timestamp PDF file.

      If I use one of the Polish Trusted Certificate Authorities (Non repudation certificate),

      Acrobat Reader displays the error with message - "Uknown critical extension"

      Because of that error Acrobat Reader can't make the certification path.


      The id of this extensions is

      (Here is the description) - http://www.alvestrand.no/objectid/


      This can be critical or non-critical extensions, which CA providers are allowed to use when generating qualified

      certificates - http://rfc-ref.org/RFC-TEXTS/3739/chapter5.html


      I am using the latest version of Acrobat Reader, Windows XP SP3.


      Hope anyone can help.


      With best regards