共享可验证的不可否认门限多代理多重签名方案

摘要

Tzeng等人提出了一个共享可验证的不可否认门限多代理多重签名方案(TYH方案),随后Bao等人与Hsu等人分别指出该方案不能抵抗伪造攻击及不真正具有共享验证的性质,且分别提出了修改方案.基于Tzeng等人方案提出一个新的共享可验证的不可否认门限多代理多重签名方案,与这三个方案相比,该方案效率更高,而且该方案克服了TYH方案的安全性缺陷,具有更好的安全性.%In 2004,Tzeng et al. Have proposed a nonrepudiable multi-proxy multi-signature scheme with shared verification (TYH scheme).Unfortunately,their scheme cannot resist the forgery attack,and it cannot achieve the property of shared veri-fication.This paper proposes an improved scheme which is based on TYH scheme.The new scheme remedies the weaknesses of TYH scheme, and it really achieves the property of shared verification.Furthermore, the proposed scheme is efficient in terms of computation complexity.