Why does RSA signing not work in Internet Explorer 3.x?
RSA Applet signing is not supported in Internet Explorer 3.02 due to the limitation of the API implementation with this particular browser. In order to have the RSA signing technology work, the plugin is required to have the Crypto 2.0 API installed and to be able to open and use the Internet Explorer codestore to store, verify and retrieve certificates. Unfortunately, Internet Explorer 3.0x does not not provide access to its codestore through the Crypto 2.0 API.