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A Type System for Checking Applet Isolation in Java Card

2005; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-3-540-30569-9_7

1611-3349

Werner Dietl, Péter Müller, Arnd Poetzsch‐Heffter,

Distributed systems and fault tolerance

A Java Card applet is, in general, not allowed to access fields and methods of other applets on the same smart card. This applet isolation property is enforced by dynamic checks in the Java Card Virtual Machine. This paper describes a refined type system for Java Card that enables static checking of applet isolation. With this type system, firewall violations are detected at compile time. Only a special kind of downcast requires dynamic checks.