基于椭圆曲线的多服务组播接入控制方案  

Elliptic curve cryptosystem based scheme of hierarchical access controlling for multi-service multicast

作　　者：徐守志[1] 程文青[1] 谭运猛[1] 杨宗凯[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第10期11-14,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(90104033)

摘　　要：以多服务组播为研究背景，研究组播的层次接入控制技术．首先，描述了多服务组播通用的业务模型，并提出一种基于多维层次树的组密钥管理模型，将不同服务子组有机地集成在一起，以实现对多种组播业务的统一管理．其次，提出一种椭圆曲线的组密钥机制，证明了组密钥机制的安全性．最后实现基于椭圆曲线的多维层次树密钥管理算法．安全性分析证明算法能保证组播系统的安全．效率分析和实验结果表明：与已有方案相比，算法的时间效率和带宽效率提高2～3倍，具有较好的健壮性和可扩展性．Hierarchical access control of multicast was studied against the background of multl-services multlcast. Firstly, general service model of multl-servlce multlcast was described, and a multidimensional hierarchical tree （MHT） based group key management model is presented to integrate all subgroups of services, which can achieve concentrative management of several services. Then, a group key mechanism based on elliptic curve cryptosystem （ECC） is proposed, and which secrecy is proved. Finally, a MHT based group key management algorithm using the ECC is illuminated. Secrecy analysis proves that it can assure secrecy for multicast system. Efficiency analysis and test result show that it can improve efficiency of time cost and bandwidth two or three times than previous works, also more expandability and scalabillty.

关 键 词：多服务组播 层次接入控制 椭圆曲线 多维层次树 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]