摘要
In this paper, the authors first review Hwang et al. 's a new multi-proxy multi-signature scheme and point out its disadvantages. To overcome the weakness, a nonrepudiable multi-proxy multi-signature scheme based on Hwang et al's scheme, is proposed. The improved version can provide the fair protection for the original signer group and the proxy group. Moreover, it is secure against the forgery attack without the secure channel.
- 出版日期2004
- 单位上海交通大学