Silverlight PKCS#11 with JavaScript Interface

We worked a lot in the past months on NCryptoki, the .NET wrapper to PKCS#11 module and we worked a lot in finding the best way to integrate PKCS#11 tokens in a web page (aspx, php, jsp, etc.). Till now we used a Java based approach using a Java Applet embedded in the web page. Such an applet includes a Java version of NCryptoki (JCryptoki) and a JQuery script that supplies a JavaScript interface to JCryptoki's classes. Such a Java approach works as expected by has some not nice-to-have security issues that: 1) give a bad user experience; 2) are higly dependant on the JRE installed on the client side. So we searched for a better way. We ported the entire NCryptoki package to Silverlight 5 and we have created a Silverlight user control that exports the NCryptoki classes to the JavaScript world. This approach seems very nice respect to the user exeprience and doesn't give strong security i... [Prosegue]