一种交换协议的理性模型及其公平机制设计

Rational model of exchange protocol and its mechanism design on fairness

理性交换协议是解决小额支付的有效方法,但是由于参与者的自利性,理性交换协议的公平性较难满足。对理性交换过程中的集体利益进行形式化定义,并基于占优策略构建理性参与者模型,以及基于占优策略和集体利益建立理性交换协议的公平性模型,基于激励相容理论设计理性交换协议的公平机制,基于理性交换协议的公平机制和扩展式博弈构建理性交换协议的理性博弈模型,并基于理性交换协议的博弈模型设计了一个理性交换协议。基于相关博弈方法证明所设计的协议满足正确性和理性公平性,并用一个案例说明方案的可行性。

Rational exchange protocol is the efficient method to solve the micropayments,however,rational exchange protocol is difficult to satisfy the fairness because of the self-interest of the participants. First,this paper formally defined the collective interests during the rational exchange and constructed the rational participants model based on the dominant strategy,and established a rational exchange protocol fairness model on the basis of collective interests and dominant strategy. Then,this paper designed a rational exchange protocol fairness mechanism based on the theory of incentive compatibility,and constructed a rational exchange protocol's rational game model based on the rational exchange protocol fairness mechanism and extensive form game,and designed a rational exchange protocol on the basis of exchange protocol fairness mechanism and extensive form game. Finally,this paper proved that the protocol satisfies the correctness and rational fairness based on the related game method and demonstrates the feasibility with a case.