一种自组织的应用层组播层次密钥管理方案  

Self-organized hierarchical key management scheme for application layer multicast

作　　者：许建真[1] 夏肖[1] 王明[1] 

机构地区：[1]南京邮电大学计算机学院,南京210003

出　　处：《计算机应用》2009年第11期2887-2890,共4页journal of Computer Applications

摘　　要：针对现有应用层组播密钥管理方案可扩展性差、时延较大等问题,设计一种适用于大规模的自组织的层次密钥管理方案(SOKM)。该方案将密钥服务器(KS)的任务分散给各个簇的特殊节点来完成,将组密钥的更新和管理限制在簇范围内。分析和仿真实验表明,与分层分簇方案MHKM相比,SOKM虽然在一定程度上增加了计算量,却有效降低了KS受攻击的可能性和组密钥分发时延,使整个组播组的安全性和密钥分发效率得到了提高,因此具有较好的可扩展性。To solve the scalability and high delay problem in Application-Layer Muhicast （ALM） group key management, SOKM, a self-organized large-scale hierarchical ALM group key management scheme was proposed. In this scheme, a special node in each cluster was chosen to be Key Server （ KS）, which confined the updating and management of group keys in cluster only. Analysis and simulations show that, compared with MHKM scheme, SOKM has the advantages of reducing the probability of KS being attacked and key forwarding delay, which lead to higher security of muhicast group and key forwarding rate, although the computation rises. Consequently, MHKM has preferable scalability.

关 键 词：安全组播 组密钥 密钥服务器 簇首 可扩展性 时延 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]