Title: Fairness in the presence of semi-rational parties in rational two-party secure computation

Authors: Zhonghong Sun

Addresses: School of Information and Electrical Engineering, Ludong University, Yantai 264025, China

Abstract: Reputation is commonly used in game theory for mutual cooperation. Assuming that parties value their reputation as well as their payoffs just like people in the real world, this paper considers reputation assumptions when defining the utilities. The new utility consists of two parts: the reputation part and payoff part. The parties are redefined according to the new utility definition. Besides, to represent a more realistic adversary model, a new adversary named semi-rational party is proposed. The semi-rational parties behave like the combination of rational and covert parties. At last, a rational two-party secure computation protocol is constructed. The proof of fairness in the presence of the semi-rational party is stressed in this paper.

Keywords: rational secure computation; fairness; game theory; Nash equilibrium; semi-rational parties; mutual cooperation; security; reputation; payoff; adversary models.

DOI: 10.1504/IJGUC.2013.056245

International Journal of Grid and Utility Computing, 2013 Vol.4 No.2/3, pp.103 - 109

Received: 05 Sep 2012
Accepted: 23 Sep 2012
Published online: 18 Sep 2014 *

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