A framework for analyzing probabilistic protocols and its application to the partial secrets exchange

Abstract

Abstract. We propose a probabilistic variant of the pi-calculus as a framework to specify randomized security protocols and their intended properties. In order to express an verify the correctness of the proto-cols, we develop a probabilistic version of the testing semantics. We then illustrate these concepts on an extended example: the Partial Secret Ex-change, a protocol which uses a randomized primitive, the Oblivious Transfer, to achieve fairness of information exchange between two par-ties.