基于树结构的Wimax网络组密钥管理方法

Group key management method based on tree-shape architecture in Wimax network

为了改善802.16e安全标准中组密钥管理的安全与应用性能,首先分析了常见的组密钥管理机制和Wimax无线网络的组密钥管理解决思路,利用密钥树和单向函数g,提出了一种改进的基于树结构的Wimax组密钥管理方法,设计了节点加入和离开网络时组密钥更新的过程.分析结果表明,与传统的逻辑密钥分层方案(logical key hierarchy,LKH)相比,该方法在密钥存储、密钥更新、通信量以及组管理者的计算量方面均有较好的性能.为Wimax网络的组密钥管理提供了一条有效解决思路,具有较高的实际应用价值.

To improve the security and applicable capability of the group key management in 802.16e standard, the traditional group key management mechanism is discussed and the current security solutions for group key management in WiMax is analyzed. By using key tree and one-way function, an improved tree-shape group key management scheme is proposed, and the key updating process during node joining in or leaving Wimax network is also designed. Analysis result shows that, compared with the conventional method of logical key hierarchy （LKH）, the proposed scheme has better performance in key storage, key updating and key calculation cost, which provides an effective solution for group key management in Wimax network and has better application value.