Dynamic Group Signature with Forward Security and Its Application

摘要：

Analyses were made on the security threats and weakness of present group signature schemes, and a dynamic group signature with forward security based on elliptic curves cryptosystem was presented. The identity blinding process and probabilistic encryption algorithm of the scheme enable the signature group to be dynamic without changing the group public key and private keys of all the group members. The scheme avoids the direct relationship between signature complexity and group scale, prevents coalition attack and generalized signature forgery. If a signature is successfully attacked or the anonymity tracing protocol is executed, other group signatures generated by the same member earlier and signatures generated by other members are still secure and anonymous, so the group signature scheme proves to be forward secure.Further detailed analyses also justify its brevity,security, high efficiency, and thus considerable improvement on system overheads regarding software and hardware application.

关键词： Forward security dynamic group signature probabilistic encryption identity blinding elliptic curves cryptosystem

作者: Xuanwu Zhou Xiaoyuan Yang Ping Wei Yupu Hu

作者单位: Key Laboratory of Network & Information Security of the APF, Engineering College of the APF, Xian 7 Key Laboratory of Network & Information Security of the APF, Engineering College of the APF, Xian 7 Key Laboratory of Network & Information Security of the Ministry of Education, Xidian University, Xi

会议类型: 国际会议

会议名称: 第六届网格与协同计算国际会议(The Sixth International Conference on Grid and Cooperative Computing GCC 2007)

会议地点: 乌鲁木齐

会议语种:英文

页码: 473-480

在线出版日期: 2007-08-16（万方平台首次上网日期，不代表论文的发表时间）