Security types preserving compilation

  • Authors:
  • Gilles Barthe;Tamara Rezk;Amitabh Basu

  • Affiliations:
  • INRIA Sophia-Antipolis, France;INRIA Sophia-Antipolis, France;Stony Brook University, USA

  • Venue:
  • Computer Languages, Systems and Structures
  • Year:
  • 2007

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Abstract

Starting from the seminal work of Volpano and Smith, there has been growing evidence that type systems may be used to enforce confidentiality of programs through non-interference. However, most type systems operate on high-level languages and calculi, and ''low-level languages have not received much attention in studies of secure information flow'' (Sabelfeld and Myers, [Language-based information-flow security. IEEE Journal on Selected Areas in Communications 2003; 21:5-19]). Therefore, we introduce an information flow type system for a low-level language featuring jumps and calls, and show that the type system enforces termination-insensitive non-interference. Furthermore, information flow type systems for low-level languages should appropriately relate to their counterparts for high-level languages. Therefore, we introduce a compiler from a high-level imperative programming language to our low-level language, and show that the compiler preserves information flow types.