Conspiracy Attack Immune(t,n) Threshold Signature Scheme with Traceability
Xiaomin Wang · Journal of Southwest Jiaotong University · 2007
A novel conspiracy attack immune(t,n) threshold signature scheme with traceability was proposed to overcome the weaknesses of the Wang-Li scheme and the improved Xie-Yu scheme.The security of this scheme was analyzed,and a comparison between efficiencies of the proposed scheme and the two schemes was made.The results show that the proposed scheme can not only resist conspiracy attacks and forgery attacks essentially,but also provide anonymity and traceability simultaneously.In addition,it can realize the unknowability of group's secret by constructing a secure distributed key generation protocol.As a result,the proposed scheme is more secure than the two schemes.Furthermore,its computational complexity and communication cost are lower than the improved Xie-Yu scheme.