This page demonstrates signing of content within a web page
using an X509 code-signing certificate, if available. It also demonstrates using
a signed Java applet to enable file signing. When the data is successfully
signed using SignedData.Sign(), the base64-encoded pkcs7 data, including the content,
is displayed with 3 buttons to verify the signature and certificate,
display the content and the certificate(s) embedded in the pkcs7 data:
