通信学报 ›› 2020, Vol. 41 ›› Issue (3): 80-90.doi: 10.11959/j.issn.1000-436x.2020046

所属专题： 区块链

• 学术论文 • 上一篇    下一篇

委托计算下基于区块链的公平支付方案

李沓1,2,田有亮1,2,3,向康1,2,高鸿峰1,4   

  1. 1 贵州大学计算机科学与技术学院，贵州 贵阳 550025
    2 贵州大学密码学与数据安全研究所，贵州 贵阳 550025
    3 贵州省公共大数据重点实验室，贵州 贵阳 550025
    4 贵州大学网络与信息化管理中心，贵州 贵阳 550025
  • 修回日期:2020-02-15 出版日期:2020-03-25 发布日期:2020-03-31
  • 作者简介:李沓（1998- ），男，贵州盘县人，贵州大学博士生，主要研究方向为密码学与区块链技术|田有亮（1982- ），男，贵州盘县人，博士，贵州大学教授，主要研究方向为博弈论、密码学与安全协议|向康（1993- ），男，湖北仙桃人，贵州大学硕士生，主要研究方向为委托计算与机器学习|高鸿峰（1975- ），男，贵州遵义人，贵州大学副教授，主要研究方向为网络与信息安全
  • 基金资助:
    国家自然科学基金资助项目(61662009);国家自然科学基金资助项目(61772008);国家自然科学基金资助项目(U1836205);贵州省教育厅科技拔尖人才支持基金资助项目([2016]060);贵州省科技重大专项计划基金资助项目(20183001);教育部—中国移动科研基金研发基金资助项目(MCM20170401);贵州大学培育基金资助项目([2017]5788);贵州省科技计划基金资助项目([2019]1098);贵州省科学技术基金资助项目([2008]2121)

Block-based fair payment scheme under delegation computation

Ta LI1,2,Youliang TIAN1,2,3,Kang XIANG1,2,Hongfeng GAO1,4   

  1. 1 College of Computer Science and Technology,Guizhou University,Guiyang 550025,China
    2 Institute of Cryptography ＆Date Security,Guizhou University,Guiyang 550025,China
    3 Guizhou Provincial Key Laboratory of Public Big Data,Guiyang 550025,China
    4 Network and Information Management Center,Guizhou University,Guiyang 550025,China
  • Revised:2020-02-15 Online:2020-03-25 Published:2020-03-31
  • Supported by:
    The National Natural Science Foundation of China(61662009);The National Natural Science Foundation of China(61772008);The National Natural Science Foundation of China(U1836205);Guizhou Provincial Department of Education Science and Technology Top Talent Support Project([2016]060);Science and Technology Major Support Program of Guizhou Province(20183001);Ministry of Education China Mobile Research Fund Project(MCM20170401);Guizhou University Cultivation Project([2017]5788);Science and Technology Program of Guizhou Province([2019]1098);Science and Technology Foundation of Guizhou Province([2008]2121)

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摘要：

传统委托计算中，由于参与者双方的自利行为，存在委托方抵赖和计算方不诚实计算等问题。在支付阶段，需采用第三方来保证支付的公平性，从而导致额外的开销且存在泄露参与者隐私的风险。利用博弈论分析了支付过程中双方达到纳什均衡解，提出一种基于比特币时间承诺的公平支付协议。首先，利用比特币时间承诺技术保证参与者支付的公平性；其次，利用区块链去中心化的特性来取代第三方服务保护各方隐私且实现责任溯源；最后从安全性和正确性对方案进行分析，证明了参与者在支付过程中诚实选择行为策略。所提方案不仅解决了传统委托计算中公平支付的难题而且保护了参与方的隐私。

关键词: 委托计算, 时间承诺, 博弈论, 公平支付

Abstract:

In the traditional delegation computation,due to the self-interested behavior of both participants,there were some problems such as the denial of the principal and the dishonest calculation by the computing party.In the payment phase,a third party was required to ensure the fairness of the payment,which led to extra costs and risks of disclosure of participants' privacy.Game theory was used to analyze the Nash equilibrium solution between the two parties in the payment process,and a fair payment protocol based on time commitment of bitcoin was proposed.Firstly,the bitcoin time commitment technology was used to ensure the fairness of payment.Secondly,the decentralized feature of block chain was used to replace the third-party service to protect the privacy of all parties and realize the source of responsibility.Finally,the scheme was analyzed from the perspective of security and correctness,which proved that the participants choose behavioral strategies honestly in the payment process.The scheme proposed in this paper not only solved the problem of fair payment in traditional delegation computation,but also protected the privacy of participants.

Key words: delegation computation, time commitment, game theory, fair payment

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