基于中国剩余定理的前向安全群盲签名方案

Forward secure group blind signature scheme based on Chinese remainder theorem

群盲签名是群签名和盲签名的结合体,它兼具群签名和盲签名的各种优越特性。在李新社等采用中国剩余定理的群签名方案的基础上,引入前向安全概念和盲签名思想,提出了一个前向安全群盲签名方案。安全性分析表明,该方案具有前向安全性、防陷害性、不可伪造性等群签名方案所具有的安全性,同时,群成员不知道所签消息的具体内容。

Group blind signature is a kind of special signature combined group signature and blind signature, which meets all advantages of both group signature and blind signature. This paper proposed a forward secure group blind signature scheme, which adds the nature of forward security and blind signature on the basis of the group blind signature based on Chinese remainder theorem suggested by Li Xinshe. The analysis of security shows that the improved scheme has forward security nature and is secure against framing attack and with unforgeability and other security nature which group signature requires, at the same time, group member can signature without revealing any information about the message.