IMPROVEMENT OF A THRESHOLD PROXY SIGNATURE SCHEME

摘要：

In 2003, Hsu et al.presented an improved proxy signature scheme based on Sun et al.s scheme to effectively defeat its drawback that the threshold value can be changed by proxy signers.However, security analysis on the improved scheme shows that both the improved scheme and the original one cant stand the insider conspiracy attack and the forge attack.Moreover, the signature based on them is not identifiable or nonrepudiable.Aiming at these weaknesses, an improved scheme is proposed in this paper.Security analysis on the new improved scheme shows that it effectively overcomes those disadvantages of Hsu et al.s scheme.

关键词： Threshold proxy signature Unforgeability Nonrepudiation Security analysis

作者: CHAO-SHENG FENG ZHI-GUANG QIN DING YUAN

作者单位: School of Computer Science, Sichuan Normal University, Chengdu Sichuan 610068,China;School of Comput School of Computer Science &Engineering, University of Electronic Science and Technology of China, C School of Computer Science, Sichuan Normal University, Chengdu Sichuan 610068,China

会议类型: 国际会议

会议名称: 2007 International Conference on Machine Learning and Cybernetics(IEEE第六届机器学习与控制论国际会议)

会议地点: 香港

会议语种:英文

页码: 3168-3172

在线出版日期: 2007-08-19（万方平台首次上网日期，不代表论文的发表时间）