The Java Card RE throws a java.lang.SecurityException exception when it detects an attempt to illegally access an object belonging to another applet across the firewall boundary. A java.lang.SecurityException exception may optionally be thrown by a Java Card VM implementation to indicate a violation of fundamental language restrictions, such as attempting to invoke a private method in another class.

For security reasons, the Java Card RE implementation may mute the card instead of throwing the exception object.

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