基于ID的群向签名方案

ID Based Group Oriented Signature

该文首先提出了一种新的签字模型,并由此设计了一种新的群向签名方案,其具有如下特点:基于ID的密码概念;不具有密钥托管功能,也就是只有成员自己知道自己的私钥,而其他成员,包括PKG也不知道;指定签名验证群中的每一个成员都可以独立地完成对签名的验证。此签名不是基于秘密共享技术的,因此,他不需要多名成员来共同完成对签名的验证。这样,既减少了对系统资源的占用,又提高了系统的效率。

A new kind of group-oriented signature is presented with a new signature model in this paper. The signature has the following properties： it is based on ID cryptography concept; does not have the function of key escrow, that is, no one, other than the member himself, knows the secret key, even the PKG does not know; the member in the designated group can verify the signature independently. The secret sharing is not used in the signature, so the cooperation among the members is not needed. Comparing to other group-oriented signature, the new one uses less system resources, and improves the system efficiency.