In RFC1949,A. Ballardie proposed a method of scalable multicast key distribution based on the Core Based Tree multicast protocol fitting for wide-area IP multicasting. This paper analyses the method deeply,points out ...In RFC1949,A. Ballardie proposed a method of scalable multicast key distribution based on the Core Based Tree multicast protocol fitting for wide-area IP multicasting. This paper analyses the method deeply,points out that the model can't resist the key compromise of a single member effectively,and proposes two kinds of improvement. One is the distributed generating and distributing group data encryption key,the other one is partitioning the group into subgroups. These improvements can increase the security and lifetime of the group key,and decrease the loss of compromise of a single group key encryption key.展开更多
Ad Hoc网络中,组播路由协议具有广泛的应用前景。但由于网络拓扑的变化和节点能量的限制,设计具有高效传输能力的组播路由协议比较困难。通过综合比较表驱动路由协议与按需路由协议的优缺点,并且考虑Ad Hoc网络中节点的移动性以及路由...Ad Hoc网络中,组播路由协议具有广泛的应用前景。但由于网络拓扑的变化和节点能量的限制,设计具有高效传输能力的组播路由协议比较困难。通过综合比较表驱动路由协议与按需路由协议的优缺点,并且考虑Ad Hoc网络中节点的移动性以及路由发现与路由维护的方法对传输效率的影响,在无状态组播路由的基础上,使用表驱动与按需路由驱动相结合的路由方法,提出一种新的组播路由协议,使传输效率有较高的提升。展开更多
Ad Hoc网络中,组播路由协议具有广泛的应用前景。但由于网络拓扑的变化,设计具有可靠数据传输能力的组播路由协议比较困难。综合考虑Ad Hoc网络中节点的移动性和节点能量对路由稳定性的影响,选取具有较高性能的链路,使得路由具有较好的...Ad Hoc网络中,组播路由协议具有广泛的应用前景。但由于网络拓扑的变化,设计具有可靠数据传输能力的组播路由协议比较困难。综合考虑Ad Hoc网络中节点的移动性和节点能量对路由稳定性的影响,选取具有较高性能的链路,使得路由具有较好的稳定性。仿真结果证明,与MAODV协议相比,设计的路由协议明显提高了数据投递率,并大大降低了丢包数。展开更多
文摘In RFC1949,A. Ballardie proposed a method of scalable multicast key distribution based on the Core Based Tree multicast protocol fitting for wide-area IP multicasting. This paper analyses the method deeply,points out that the model can't resist the key compromise of a single member effectively,and proposes two kinds of improvement. One is the distributed generating and distributing group data encryption key,the other one is partitioning the group into subgroups. These improvements can increase the security and lifetime of the group key,and decrease the loss of compromise of a single group key encryption key.
