TY - JOUR
T1 - Partial fairness in secure two-party computation
JF - Advances in Cryptology–EUROCRYPT 2010
Y1 - 2010
A1 - Gordon,S.
A1 - Katz, Jonathan
AB - A seminal result of Cleve (STOC ’86) is that complete fairness is impossible to achieve in two-party computation. In light of this, various techniques for obtaining partial fairness have been suggested in the literature. We propose a definition of partial fairness within the standard real-/ideal-world paradigm that addresses deficiencies of prior definitions. We also show broad feasibility results with respect to our definition: partial fairness is possible for any (randomized) functionality f:X ×Y →Z 1 ×Z 2 at least one of whose domains or ranges is polynomial in size. Our protocols are always private, and when one of the domains has polynomial size our protocols also simultaneously achieve the usual notion of security with abort. In contrast to some prior work, we rely on standard assumptions only.We also show that, as far as general feasibility is concerned, our results are optimal (with respect to our definition).
M3 - 10.1007/978-3-642-13190-5_8
ER -