一种基于身份信息无可信中心无随机预言的群签名  

An ID-based Group Signature Scheme Without Trusted PKG or Random Oracles

作　　者：蔡永泉[1] 刘岩[1] 

机构地区：[1]北京工业大学计算机学院,北京100124

出　　处：《电子学报》2009年第B04期87-91,共5页Acta Electronica Sinica

基　　金：国家973重点基础研究发展规划(No.2007CB311100)

摘　　要：本文提出了一种标准模型下基于身份的无可信中心的群签名方案,解决了群签名的前向安全性,并分析了新方案的正确性和安全性.分析结果表明,合法的群成员可以代表群得到有效群签名,仲裁者可以打开签名,且可以判断群管理者是否伪装成合法的群成员.本文还利用对时间段信息的管理实现了该签名的前向安全性,以抵抗密钥泄漏等情况.In a group signature scheme,any legal member of this group can sign on behalf of this group,and no one can find out which member is the actual signer except the group manager. The focus of this paper is to design a new ID-based group signature without trusted PKG（group manager） or random oracles, and the security of the scheme, such as forward security. According to the analysis result,legal group members can sign on behalf of the group;an arbiter（OM） can open a legal signature to find out the actual signer, and he can also point out that whether the group manager is legal or not. So this is a scheme without trusted PKG without random oracles. Besides, this paper takes advantage of the information of time section to implement the forward security of this scheme in case of key exposure or revocation of group members.

关 键 词：基于身份群签名 无随机预言 无可信中心 前向安全 双线性映射 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]