title: How to digitally sign PDF documents in a web application?
body: <p>I'm building a web application that most allow the user to digitally sign PDF documents with certificates installed in the client machine.</p>
  
  <p>The document, once signed, should be posted back to the server, where it will store the signed version.</p>
  
  <p>The server is running Classic ASP/ASP.NET</p>
  
  <p>Where should I go?</p>