Termination-Insensitive Computational Indistinguishability (and applications to computational soundness)

Dominique Unruh.
in 24th IEEE Computer Security Foundations Symposium, CSF 2011, IEEE Computer Society, pp. 251-265, June 2011. Preprint on IACR ePrint 2010/505.

Abstract

We defined a new notion of computational indistinguishability: termination-insensitive computational indistinguishability (tic-indistinguishability). Tic-indistinguishability models indistinguishability with respect to distinguishers that cannot distinguish between termination and non-termination.

We sketch how the new notion allows to get computational soundness results of symbolic models for equivalence-based security properties (such as anonymity) for processes that contain loops, solving an open problem.

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