摘要： 群签名允许一个群中的成员代表整个群体签发消息,签名者的身份是保密的,除非需要时由一个指定的群控制者来揭示其身份。以往的各种群签名方案虽然很好地满足了群签名的各种性质,但是效率都不高。该文提出了一种基于GDH假设的新型群签名方案,它将基于身份的签名和利用椭圆曲线来生成的签名结合起来,既保证了群签名的各种性质及安全性,又在效率上有了提高,同时签名的长度也短得多。

关键词: 群签名, 基于身份的签名, 椭圆曲线, Weil配对

Abstract: Agroupsignatureschemeallowsmembers of a group to sign messages on behalf of the group. The identity of the signer is secret except that the designated group manager can identity the signer when needed. The previously proposed group signature schemes satisfy the above properties, however, they don't perform well as far as efficiency is concerned. This paper proposes a novel group signature scheme based on GDH assumption that combines the identity-based signature and the signature on elliptic curves. In addition toallthepropertiesofgroupsignature,securityisalsoproved.Furthermore,the methodshowsefficiencyisimprovedandlengthofsignatureisshorter.

中图分类号: 

• TP393.08