On the Composition of Secure Systems

  • Authors:
  • Heiko Mantel

  • Affiliations:
  • -

  • Venue:
  • SP '02 Proceedings of the 2002 IEEE Symposium on Security and Privacy
  • Year:
  • 2002

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Abstract

When complex systems are constructed from simpler components it isimportant to know how properties of the components behave undercomposition. In this article, we present various compositionalityresults for security properties. In particular, we introduce a novelsecurity property and show that this property is, in general,composable although it is weaker than forward correctability.Moreover, we demonstrate that certain nontrivial security propertiesemerge under composition and illustrate how this fact can beexploited.All compositionality results that we present areverified with the help of a single, quite powerful lemma. Basing onthis lemma, we also re-prove several already known compositionalityresults with the objective to unify these results. As a side effect,we obtain a classification of known compositionality results forsecurity properties.