一个新的多重代理多重签名方案
A New Multi-proxy Multi-signature Scheme
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摘要: 为克服多重代理签名方案中无法确认谁是真正签名者的弱点,Sun于1999年提出了不可否认的代理签名方案。2000年Hwang等人指出Sun的方案不安全,并对Sun的方案进行了改进,2004年 Tzeng, Tan, Yang各自对Hwang等人的方案进行了安全性分析,指出Hwang方案容易受到内部伪造攻击。该文通过让原始签名组与代理签名组互动来实现秘密共享和密钥分配的方法,设计了一种新的安全的多重代理、多重签名方案,它能够满足不可否认性和不可伪造性的要求。
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关键词:
- 数字签名;代理签名;多重代理;多重签名
Abstract: To avoid dispute about who are the actual signers, Sun first proposed a nonrepudiable threshold proxy signature scheme with known signers. Hwang et al.(2000) showed that Suns scheme is insecure and made an improvement on Suns scheme. Presently, Tzeng, Tan, Yang found that Hwang, et al.s scheme is vulnerable against the conspiracy. This paper used the method of through intercommunion between original signer group and proxy signer group to achieve secret share and distributed keys, designed a new multi-proxy multi-signature scheme. The new scheme fully meets unforgeability and nonrepudiation requirements.
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