Q: Create digitally signed PDFs

Digital Signature is a feature of Adobe Acrobat Pro and possibly Adobe Acrobat ( I haven't checked).
You might also be interested in a freeware app pdfPen or you might have to purchase the Pro version for that.



-mj

Is this what you're looking for:

http://www.mac-minimalist.com/2008/07/how-to-sign-pdf-document.html

tobias Eichner wrote:
Suggestions and product recommendations are still welcome

How about PortableSigner? It's free, so the price is right, especially for trying it out. I don't know enough about it to test it, but it signs PDFs using X.509 certificates, which sounds like it might fit the bill.

charlie

tobias Eichner wrote:
Is PortableSigner a professional tool that really works ?

I have no idea how good it is, and I don't really have any benchmark to compare it to. It's hosted at Sourceforge, which might explain why the web site is a big crude-looking. On the other hand, the site says it's a project of the Municipality of Vienna, so I'd say that it appears it's good enough for at least one government.

My feeling is that a lot of the software at Sourceforge is written for a specific, fairly specialized purpose, and sometimes not a lot of time is spent on the GUI or user-friendly features. But if your purpose happens to meet up with the purpose of the creators, the software can be a life-saver.

Really, I'd say just download it and try it. Only you know if it's good enough or not. And you've got nothing to lose since it's free.

charlie