一個(gè)新的多重代理多重簽名方案
A New Multi-proxy Multi-signature Scheme
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摘要: 為克服多重代理簽名方案中無法確認(rèn)誰是真正簽名者的弱點(diǎn)，Sun于1999年提出了不可否認(rèn)的代理簽名方案。2000年Hwang等人指出Sun的方案不安全，并對(duì)Sun的方案進(jìn)行了改進(jìn)，2004年 Tzeng, Tan, Yang各自對(duì)Hwang等人的方案進(jìn)行了安全性分析，指出Hwang方案容易受到內(nèi)部偽造攻擊。該文通過讓原始簽名組與代理簽名組互動(dòng)來實(shí)現(xiàn)秘密共享和密鑰分配的方法，設(shè)計(jì)了一種新的安全的多重代理、多重簽名方案，它能夠滿足不可否認(rèn)性和不可偽造性的要求。
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關(guān)鍵詞:
- 數(shù)字簽名;代理簽名;多重代理;多重簽名
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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