摘要
In 2005, Bao, et al. [Appl. Math. and Comput., vol.169, No.2, 2005] showed that Tzeng, et al.’s nonrepudiable threshold multi-proxy multi-signature scheme with shared verification was insecure, and proposed an improved scheme with no Share Distribution Center (SDC). This paper shows that Bao, et al.’s scheme suffers from the proxy relationship inversion attack and forgery attack, and pro- poses an improvement of Bao, et al.’s scheme.
In 2005, Bao, et al. [Appl. Math. and Comput., vol.169, No.2, 2005] showed that Tzeng, et al.＇s nonrepudiable threshold multi-proxy multi-signature scheme with shared verification was insecure, and proposed an improved scheme with no Share Distribution Center （SDC）. This paper shows that Bao, et al.＇s scheme suffers from the proxy relationship inversion attack and forgery attack, and proposes an improvement of Bao, et al.＇s scheme.
基金
Supported by the National Natural Science Foundation of China (No.10671051)
the Natural Science Foundation of Zhejiang Province (No.Y105067).
