J4

• 研究论文 • 上一篇    下一篇

一种基于短签名和离线半可信第三方的公平交换协议

辛向军1,2;李发根3;肖国镇1
  

  1. (1.西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安 710071;2.郑州轻工业学院 信息与计算科学系,河南 郑州 450002;3.西安电子科技大学 教育部网络与信息安全重点实验室,陕西 西安 710071)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-20 发布日期:2007-02-25

A fair exchange protocol based on short signature with the off-line semi-trusted third party

XIN Xiang-jun1,2;LI Fa-gen3;XIAO Guo-zhen1
  

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi′an 710071,China;2. Dept. of Information and Computing Science, Zhengzhou Univ. of Light Industry, Zhengzhou 450002,China;3. Ministry of Edu. Key Lab. of Computer Networks and Information Security, Xidian Univ., Xi′an 710071,China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-02-20 Published:2007-02-25

摘要: 基于一个短签名方案和离散对数问题,给出了一种新的具有离线半可信第三方的公平交换协议.协议中离线第三方只有在意外的情况下才介入协议,从而实现了公平交换的最优化.离线第三方不必完全可信,因其在解决纠纷的同时并不能获得交换双方的签名.由于基于短签名,所需存储和通讯的数据量小,故该协议适用于低带宽通信以及需要较小的数据存储量的环境.

关键词: 短签名, 数字签名, 公平交换协议, 电子商务

Abstract: Based on a short signature scheme and discrete logarithm problem, a new fair exchange protocol with the off-line semi-Trusted Third Party (TTP) is proposed. The off-line semi-TTP intervenes into the protocol in case of trouble, which makes the fair exchange optimistic. The off-line TTP need not be completely trusted, since it can get neither signature exchanged when disputation is solved. Because this protocol is based on short signature, which needs low storage and little communication, it can be used in low-bandwidth communication and low-storage environments.

Key words: short signature, digital signature, fair exchange protocol, E-commerce

中图分类号: 

  • TN918.1