Signing Java Applet Jar-files

keytool -genkey -alias TestApplet - Create a public/private key pair for the specified alias

keytool -selfcert - Create a certificate for the key you created in the previous step

jarsigner nameofyour.jar TestApplet


Links:
1. Creating-a-Trusted-Applet-with-Local-File-System-Access-Rights

2. signed-applet

3. Chapter 10: Signed Applets