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Java Card™ Technology for Smart Cards by Zhiqun Chen

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Glossary

AID (application identifier)

Unique number assigned to an applet instance or a Java package.

APDU (application protocol data unit)

Data unit exchanged between a smart card and a terminal at the application layer. An APDU contains either a command or a response.

Applet firewall

Protection mechanism that enforces applet isolation and separates the system space from the applet space. In the firewall scheme, each applet runs within a context (object space). Applets cannot access each other's objects unless they are defined in the same package (and thus share the same context) or through well-defined and secure object-sharing mechanisms supported by the Java card platform.

API (application programming interface)

It defines calling conventions by ...

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