Type Checking Privacy Policies in the π-calculus

Abstract : In this paper we propose a formal framework for studying privacy. Our framework is based on the π-calculus with groups accompanied by a type system for capturing privacy requirements relating to information collection, information processing and information dissemination. The framework incorporates a privacy policy language. We show that a system respects a privacy policy if the typing of the system is compatible with the policy. We illustrate our methodology via analysis of privacy-aware schemes proposed for electronic traffic pricing.