===== 6.1 Applet Firewall =====

The applet firewall within Java Card technology is runtime-enforced protection and is separate from the Java technology protections. The Java programming language protections still apply to Java Card applets. The Java programming language ensures that strong typing and protection attributes are enforced.  

Applet firewalls are always enforced in the Java Card VM. They allow the VM to automatically perform additional security checks at runtime.