一种安全的组签字方案

A Secure Group Signature Scheme

基于离散对数给出了一种组签字方案。该方案保留了已有方案的主要优点 ,并且解决了“匿名”性问题。在该方案中 ,既使组权威公布了一些附加信息以供验证者确认签字者的身份 ,但可确保签字者其它的组签字的“匿名”性 ,组权威也不必更新签字者的任何密钥。因为组权威公布的信息只是为了识别指定的组签字。

Based on the discrete logarithm,this paper proposes a group signature schemes.The scheme preserves the main merits inherent in previously proposed schemes ,and solves the anonymity problem.In the scheme,even though the group authority announces some additional information to provide the verifier with confirmation of the identity of the signer,the anonymity of this signer will be maintained in the other group signatures ,and the group authority need not renew any of the keys of this signer .The reason is that announced information is only provided in order to identify the specific group signature.