矢量空间秘密共享群签名方案

Vector Space Secret Sharing Group Signature Scheme

本文通过引入矢量空间秘密共享技术和阈下通道技术 ,提出了一种新的群签名方案 .在本签字体制建立后 ,可以加入或删除成员 .一个部门只有在一定数量成员的参与下 ,才可以生成有效的群签名 .接收者可以验证签名的有效性 ,但是不能判断出群签名出自哪一个部门 .当有争端发生时 ,仲裁者可以“打开”群签名 ,确定签名的部门 .此签字的公钥长度是独立的 .“打开”过程通过阈下通道实现 .

Suppose that there are λ departments in a company Ω and any Dept. has the right to sign a message on behalf of the company. The group signature made by the Dept. should be agreed by the members whose number is over the threshold. The receiver can verify the validity of the signature but can't distinguish which Dept. the signature comes from. When the dispute occurs, only the authority can open the group signature to distinguish where the signature comes from. Motivated by this consideration, with the combination of vector space secret sharing and subliminal channel technology, a new group signature is presented in this paper. The member can be added or deleted after the scheme founded and the public key length is independent. The open process in the presented group signature is realized by subliminal channel.