Program transformation for non-interference verification on programs with pointers

Abstract

Novel approaches for dynamic information flow monitoring are promising since they enable permissive (accepting a large subset of executions) yet sound (rejecting all unsecure executions) enforcement of non-interference. In this paper, we present a dynamic information flow monitor for a language supporting pointers. Our flow-sensitive monitor relies on prior static analysis in order to soundly enforce non-interference. We also propose a program transformation that preserves the behavior of initial programs and soundly inlines our security monitor. This program transformation enables both dynamic and static verification of non-interference.