An approach for analyzing bytecode information flow

Existing approaches are inadequate to address the information flow in Java bytecode and the type systems verification often used in these approaches is imprecise. This paper presents a method to disclose Java bytecode information flow, in which the information dependence relationship among the variables in the bytecode is determined by data-flow analysis and information flow policy is verified by type-checking method. Since the analysis object is bytecode, this approach can be used for Java mobile code systems. The precision of verification can be improved because of this approach.