基于混合结构的广播加密方案的设计和实现  

Design and implementation for broadcast encryption scheme based on hybrid structure

作　　者：武楠 刘璟 姚绍文[2] 郑琳 Wu Nan;Liu Jing;Yao Shaowen;Zheng Lin(College of Information Science&Engineering,Kunming 650091,China;School of Software,Yunnan University,Kunming 650091,China)

机构地区：[1]云南大学信息学院,昆明650091 [2]云南大学,软件学院,昆明650091

出　　处：《计算机应用研究》2018年第10期3096-3099,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61363084);云南大学第四批中青年骨干教师基金资助项目(XT412003);云南大学师资队伍建设基金资助项目(XT412001)

摘　　要：如何高效、安全地分发新的组密钥是广播加密研究的重点。经典的完全子树(complete subtree,CS)协议通信开销较大;而排外完全子树(exclusive complete subtree,ECS)协议则具有常量的通信开销,但是ECS协议仅抵抗单用户的攻击。结合ECS协议具有常量通信开销和CS协议完全抗合谋攻击的特点,设计并实现了一种混合结构的广播加密方案,该方案牺牲了较小的抗合谋攻击能力,获取了较低的通信开销。最后,通过仿真实验验证了该混合方案的有效性,同时分析了该方案在安全性和带宽之间的折中。How to efficiently and securely distribute new group keys is the focus of broadcast encryption.The typical complete subtree(CS)protocol has a high communication overhead.However,exclusive complete subtree(ECS)protocol with constant communication overhead,it is only secure against any single-user attack.Combined the ECS protocol with a constant communication overhead and CS protocol with fully from collusion,this paper designed and implemented a hybrid broadcast encryption scheme.The scheme achieved lower communication cost at the expense of sacrificing some small leverl of collusion.Finally,simulation experiments verity the availability of the scheme,and analyze the tradeoffs between security and bandwidth.

关 键 词：广播加密 混合结构 抗合谋攻击 通信开销 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]