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中文摘要：
逻辑密钥树方案有效地减轻了组播通信中组成员及组控制器的负担,但组通信过程中的开销较大。提出了一种新的组播密钥管理方案,该方案根据组成员失效概率大小,将失效概率大的组成员置于右子树中右孩子节点处,而根节点和左孩子为相同组成员,从而构建逻辑密钥二叉树,这与现存LKH方案中密钥树的创建过程不同。通过对逻辑密钥二叉树的构造以及仿真实验的分析,均说明该方案在节点失效后的密钥更新量、节点的存储量比LKH方案要小,网络的抵抗性能好。
英文摘要：
LKH scheme lightens the burden of the server and group members efficiently,while overhead in multicast commu-nication is large.According to the failure probabilities of nodes,a new multicast key management scheme is proposed in this paper.In order to build a logical key tree in the program,nodes with greater failure probabilities are located in the right posi-tion of a sub-tree,while the root is the same node as its left child,which is different from the existing LKH scheme.By demonstration as well as experimenti,t proves that the scheme is better on nodes storage,amount of key updater,esistance of network than the LKH scheme.
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