I'm new to iTextSharp (and general PDF devel).
Can anyboy give me some "startup" how to digital sign a PDF document?
As far as I know signed PDFs there are two kinds of.
One is simply signed - and the other one is a "Certified Document".
In Acrobat I get asked (when I am the first signer) if I want to certify the document.
And furtheron - there tow kinds of signing - one is with a visible signature - and one is without it.
My primary goal is to
a.) open an existing PDF
b.) select a certificate from the users CertStore (CryptoAPI)
c.) create a "Certified document" with the selected key
d.) place a visula representation of it on the last page of the document.