What signing tool to use if your applet needs to run in Microsoft Browser and netscape Browser?
Creating a Certificates File to Use With Navigator or Internet Explorer: When creating a certificates file to interact with Netscape Navigator or Microsoft Internet Explorer (IE), there is a common source of confusion. By default, keytool issues DSA public keys, but Navigator and IE do not recognize DSA public keys as part of their authentication procedures.
If you wish to interact with Navigator or IE, you will want to issue RSA keys. To do this, you need to specify the -keyalg RSA option when using keytool. For example: