peut-on signer numériquement un pdf produit avec latex ?

Salut,

j'essaie la signature numérique avec Adobe Reader 8.1.6.

"You are in signature preview mode.  This document is not PDF/SigQ compliant and may display inconsistently."

clic sur view report

The document contains rich content that cannot be reliably suppressed.  Contact the document author
regarding wether you should sign or trust signatures in this document.

Unrecognized PDF content: The document contains PDF content or custom content not supported by the
current version of Adobe Reader.

Est-ce à dire qu'un document pdflatex est insignable ?

Pierre Albarède