独立群密钥更新模型研究  

Research on Independence Rekey Model for Group Key Management

作　　者：周健[1,2] 孙丽艳[1] 

机构地区：[1]安徽财经大学管理科学与工程学院,蚌埠233041 [2]北京邮电大学电子工程学院,北京100083

出　　处：《计算机科学》2015年第8期190-193,214,共5页Computer Science

基　　金：国家自然科学基金项目(61402001);安徽省高等学校自然基金资助项目(KJ2013B001)资助

摘　　要：针对群组密钥更新中非更新成员参与共享密钥计算增加交互延时的问题,提出了一种独立密钥更新模型,通过门限密钥共享秘密乘积机制和双线性对设计一种独立群组密钥管理方案,群组成员具有满足密钥独立性的解密密钥。公开加密密钥更新不会破坏非更新成员解密密钥的有效性,使得非更新成员不参与密钥加入/退出操作,减少密钥更新延时和计算开销,符合独立密钥更新模型,适用于计算和延时受限的无线网络场景。In group key management, much time is expended in rekeying due to non update members taking part in rekeying to distribute key material. To solve the problem, a novel independence rekeying model was presented, and then an independence group key management was designed based on bilinear pairing and shared production of threshold cryp- tography,which meets key independence and all non update members don＇t participate in rekeying for key joining/leaving operation. The fresh public encryption key cannot break the validity of secret decryption keys belonging to non update members. Therefore, the rekeying delay time and computation cost of proposed scheme are reduced efficiently. It al- so meets the independence rekeying model logically,moreover the scheme is suitable to wireless networks whose time delay and computation are limited strictly.

关 键 词：群组密钥管理 密钥更新 密钥独立性 更新延时 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]