You would need to consult with VeriSign to determine the actual product
you should invest in, and how to implement their PKI. That being said, a
digital signature on a PDF is created using an x509 compliant digital
certificate. These certificates can be self-signed (created with Acrobat
Pro or some other third party utility) or by a Certificate Authority
such as VeriSign.You may also want to look at "electronic" signatures
that are supported on PDFs using the signature field object and usually
a...