Noninterference with Local Policies
This work addresses security verification for systems with localized policies, but it appears incremental as it extends existing noninterference theory to a more specific setting.
The paper tackles the problem of state-based noninterference in systems with varying security policies across different parts, developing a theory that includes security definitions, characterizations, algorithms for analysis, and complexity results.
We develop a theory for state-based noninterference in a setting where different security policies---we call them local policies---apply in different parts of a given system. Our theory comprises appropriate security definitions, characterizations of these definitions, for instance in terms of unwindings, algorithms for analyzing the security of systems with local policies, and corresponding complexity results.