【摘要】 现有的群签名方案都假设所有成员拥有相同的权限 ,不适用于成员权限不同的情形 ,该文提出授权群签名的概念 ,并给出一个具体的授权群签名方案 .该文通过在一般群签名上增加一个负责授权的权限管理员和一个授权过程来达到授权群签名 .在所给出的授权群签名方案中 ,签名人必须同时使用私钥和授权证书才能签名 ,因此只能按所授的权限签名 ,验证人则可通过权限公开证书对授权进行验证 .更多还原

【Abstract】 All the group signature schemes available are supposed that all members have the same right to sign and can not be used in the cases where different members have different rights.To cover this shortage,this paper introduces a concept of the authorized group signature and proposes an authorized group signature scheme to implement it.The authors add a new party,the right manager,and a new procedure,AUTHORIZE procedure to the standard group signatures to achieve the authorized group signatures.In the proposed authorized group signature scheme,the signer can sign a signature only when he knows both a secret key of one group member and a secret certificate so he can sign only in his own right authorized by the right manager,and the verifier can verify the signer’s right by verifying the corresponding public certificate.更多还原