自适应无线组播密钥分组管理算法  

Adaptive wireless multicast key grouping management algorithm

作　　者：李惠杰[1] 侯利明[1] 林孝康[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第1期74-77,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：IEEE 802.16e支持组播和广播业务,并定义了组播广播密钥更新算法(MBRA)来维护和管理组播密钥。为了提供安全组播所需的前向安全和后向安全并且提高组播密钥管理算法的可扩展性,该文参照组密钥管理协议(GKMP)对MBRA进行了优化和改进,提出一种自适应无线组播密钥分组管理算法。该算法针对实际网络的特点,结合2种分组方法,以近似最优的策略对组播成员进行分组管理。理论分析和仿真结果表明:该算法可以显著地降低组播业务中因密钥更新导致的通信开销,从而提高网络容量。IEEE 802.16e supports multicast and broadcast services, with a multicast and broadcast rekeying algorithm （MBRA） defined to maintain and manage the multicast keys. In order to provide forward and backward secrecy for secure multicast services and to improve the scalability of the multicast key management algorithm, the MBRA is modified and optimized based on the group key management protocol （GKMP）, and an adaptive wireless multicast key grouping management algorithm is proposed. For real networks, the algorithm combines two grouping schemes and divides the multicast members into subgroups with an approximately optimized mechanism. Theoretical analyses and simulation results show that the algorithm significantly reduces key updating communication costs in the multicast service and improves the network capacity.

关 键 词：通信协议 无线组播 密钥管理 

分 类 号：TN915.04[电子电信—通信与信息系统]