digitally sign pdf in browser

we are trying to digitally sign pdf on a browser probably using js. the only good link i could find is this http://acrobatusers.com/forum/javascript/javascript-digitally-sig开发者_StackOverflow社区n-multiple-pdf-documents-batch-processing have you found the answer to this problem ? did you successed in that task. thank you in advance.

We used the combo JavaApplet + iText

I think you should take a look at DigiSigner. It is a PDF viewer with digital signature functionality. It is implemented in java, so it can run also as an applet in the browser on the client's side. There are demos, which does exactly what you need.

The answer depends on exact architecture of your solution, i.e. where the document is located and where the certificates are located. If you have a server-side solution and the document is on the server and you need to sign it using client's certificate, then you need to involve distributed signing. This is possible using PDFBlackbox pacakge of our SecureBlackbox product with distributed cryptography add-on which offers client-side modules (activex, flash control, java applet) for distributed data signing.