Reliable evidence: auditability by typing

  • Authors:
  • Nataliya Guts;Cédric Fournet;Francesco Zappa Nardelli

  • Affiliations:
  • MSR-INRIA Joint Centre;Microsoft Research and MSR-INRIA Joint Centre;INRIA and MSR-INRIA Joint Centre

  • Venue:
  • ESORICS'09 Proceedings of the 14th European conference on Research in computer security
  • Year:
  • 2009

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Abstract

Many protocols rely on audit trails to allow an impartial judge to verify a posteriori some property of a protocol run. However, in current practice the choice of what data to log is left to the programmer's intuition, and there is no guarantee that it constitutes enough evidence. We give a precise definition of auditability and we show how typechecking can be used to statically verify that a protocol always logs enough evidence. We apply our approach to several examples, including a full-scale auction-like protocol programmed in ML.