A naïve question: Where to go for certificates for digital signing of PDF Documents?

In theory, one can sign PDF with a variety of certificates, from self-signed and simple mail ID from VeriSign to level 2 and 3 certificates…(well, SSL certificates do not work).

However, there is a problem: Adobe Reader (and probably Acrobat) come “out of the box” with only one _trusted_, root certificate – that of Adobe Inc.

And thus, certificates issued by any ‘other’ CA (veriSign, …) all scare the reader:

“Authenticity of this certificate can not be verified”.

A simple fix is enabling the Reader “Windows Integration” and voila – all the standard, Windows trusted CAs become available and my signatures now verify nicely. UNFORTUNATELY, enabling “Windows Integration” is somewhat hidden in Reader interfaces, and I can list all those steps in my signature, and a normal web user gets scared when looking at my documents…

Hence, it comes to “where can I get certificates rooted in Adobe CA”?

And it seems that the only source for such certificates is the VeriSign (formerly GeoTrust) “Adobe Certified Document Services” program – which (besides the pricing) has a drawback of utilizing USB iKey 2032 (which I am having a real difficulty interfacing).

Does anyone know about some other source of Adobe CA rooted certificates?