The applet firewall confines an applets actions to its designated context. To enable applets to interact with each other and with the Java Card RE, some well-defined yet secure mechanisms are provided so one context can access an object belonging to another context.

These mechanisms are provided in the Java Card API and are discussed in the following sections:

• Section 6.2.1, Java Card RE Entry Point Objects

• Section 6.2.2, Global Arrays

• Section 6.2.3, Java Card RE Privileges

• Section 6.2.4, Shareable Interfaces