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Chameleon签名方案是一种利用Hash-and-Sign模式的非交互签名方案,并且具有不可转移性,只有指定的接收者才可以确信签名的有效性.利用双线性对提出了一种新的Chameleon Hash函数,并在此基础上构建了相应的基于身份的Chameleon签名方案.与传统的Chameleon Hash函数相比,该方案中的Hash函数公钥所有者无须获取相应私钥,除非它企图伪造签名.该方案不但具有通常Chameleon签名方案的所有特点,而且具有基于身份密码系统的诸多优点.
Chameleon signature scheme is a non-interactive signature scheme using Hash-and-Sign mode, and is not transferable, only the designated receiver can be sure of the validity of the signature.By using bilinear pairing, a new Chameleon Hash function, and based on which a corresponding identity-based Chameleon signature scheme is constructed.Compared with the traditional Chameleon Hash function, the Hash function public key owner does not need to obtain the corresponding private key unless it attempts to forge the signature. This scheme not only has all the characteristics of the usual Chameleon signature scheme, but also has many advantages of identity-based cryptography.