基于SCS方案的透明恢复的优化不可否认协议

在基于证书的不可否认协议中,验证方在验证不可否认证据(签名)时,还要搜集存储检验签名者公钥证书的有效性,这对验证方来说是一个负担。论文首先提出了基于GSP(Girault-Poupard-Stern)签名方案的SCS(self-certifiedsignature)方案,它能在一个签名验证的过程中同时检查签名和证书的有效性,具有较高的效率。然后,根据该方案对O.Markowitch和S.Kremer在文献[6]中提出的不可否认协议进行了改进。改进后的协议除了满足一般的透明恢复的不可否认协议的要求外,还具有高效性、机密性,而且对签名者的声誉进行了有效的保护。

Optimistic Non-repudiation Protocol with Transparent Recovery Based on SCS

In general optimistic non-repudiation protocol based on Public Key system,another verification of certification is needed during the signature verification,obviously it is a burden for the verifier.In this paper we first propose a self-certified signature based on the GSP signature scheme,through which a verifier verifies both signer's signature on the message and related certification information together.Then,we apply it to improve on the non-repudiation protocol proposed by O.Markowitch and S.Kremer in[6].The interesting of our protocol is that it has security,recoverability,more efficiency,and can provide more effective credit protection excepting normal virtues.