AspPDF Digital Signing Demo

Protect the integrity of your PDF and provide proof of the author's identity by embedding a digital signature into the document.

AspPDF (in tandem with AspEncrypt) is capable of signing new as well as existing PDF documents using a X.509 certificate obtainable from a certification authority such as Verisign or Thawte. This demo signs an arbitrary PDF document with a test certificate. Upload your document to our server using the form below and AspPDF will embed a digital signature into it.

We recommend using Adobe Acrobat 6.0 and above to view the signature. Earlier versions may report the signature to be invalid as the certificate used in the demo is not issued by Verisign.

Download source code for this demo