Extended Asymmetric Group Key Agreement for Dynamic Groups and Its Applications

摘要：

Group Key Agreement (GKA) is a crypto-graphic primitive allowing two or more entities to negotiate a shared session key over public net-works. In existing GKA models, it is an open prob-lem to construct a one-round multi-party GKA pro-tocol. Wu et al. recently proposed the concept of asymmetric group key agreement (ASGKA) and re-alized a one-round ASGKA protocol, which affirma-tively answers the above open problem in a relaxed way. However, the ASGKA protocol only applies to static groups. To fill this gap, this paper proposes an extended ASGKA protocol based on the Wu et al. protocol. The extension allows any member to join and leave at any point, provided that the resul-ting group size is not greater than n. To validate the proposal, extensive experiments are performed and the experimental results show that our protocol is more effective than a plain realization of the Wu et al. protocol for dynamic groups. The extended pro-tocol is also more efficient than the up-to-date dy-namic GKA protocol in terms of communication and computation.

关键词： key management key agreement asym-metric group key agreement dynamic groups

作者: Qianhong Wu Zhang Xinyu Tang ing Yin Peng Qiu Zhenlong

作者单位: State Key Lab. of AlS&TC, Ministry of Education, Wuhan University, Wuhan 430072, P. R. China School School of Computer, Wuhan University, Wuhan 430072, Hubei Province, P. R. China School of Computer,Wuhan University, Wuhan 430072, Hubei Province, P. R. China

会议类型: 国际会议

会议名称: 2011年中国计算机学会服务计算学术会议(CCF NCSC2011)

会议地点: 济南

会议语种:英文

页码: 32-40

在线出版日期: 2011-08-18（万方平台首次上网日期，不代表论文的发表时间）