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PDF timestamping

You may want to sign and put a timestamp on your PDFs in order to give them a specific date. Most of PDF certificates include a timestamp service.

TBS X509 Sign&Login and Email Professionnel certificates can timestamp PDF by using http://timestamp.comodoca.com/rfc3161

But, from a certain volume of signature, a timestamping local server can be needed.

Further information:

Référentiel Général de Sécurité version 2.0 - Timestamping policy:
http://www.ssi.gouv.fr/IMG/pdf/Annexe_A5.pdf