Key Management for Wireless Hierarchical Multicast
A new design scheme of key management tree is proposed for multiple levels multicast communication in wireless network. The network key tree matches with the actual network topology in the scheme and the key nodes in the trees only need to transfer its as
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Key Management for Wireless Hierarchical Multicast Jingjing Zheng, Chunyu Zhao and Hongyun Wang
Abstract A new design scheme of key management tree is proposed for multiple levels multicast communication in wireless network. The network key tree matches with the actual network topology in the scheme and the key nodes in the trees only need to transfer its associated key information. At the same time using the partial order relation between data resources and user ordering in multicast service, users can be grouped; those who have the same ordering relations are in the same group. In this scheme multiple key trees are unified into a single key tree. The amount of the keys stored in key management center (KDC) is calculated and key update process is offered. The simulation results show that the scheme effectively reduces the redundancy key amount and the communication overload produced by the key updating. Keywords Logical key tree
Topology Partial order Multicast
70.1 Introduction Because in a large group communication security network, it is impossible that only a multicast data stream is present. The previous method needs set a key management tree for each multicast data stream. It generates a large number of redundant key [1]. From access control on the network, different users may have different access levels; therefore, a key management tree of the multilayer data flows will decrease the number of keys. J. Zheng (&) C. Zhao H. Wang HuangHe S&T College, Zhengzhou, Henan province 450005, People’s Republic of China e-mail: [email protected]
W. Lu et al. (eds.), Proceedings of the 2012 International Conference on Information Technology and Software Engineering, Lecture Notes in Electrical Engineering 210, DOI: 10.1007/978-3-642-34528-9_70, Springer-Verlag Berlin Heidelberg 2013
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For example, in wireless multicast service, it may contain a large number of data stream, such as news, weather, financial and others. The order quantity of users who belong to different levels is not the same, some users may only order news, and others may order two of them. The users who order the same data stream are divided into a group, and the data stream which the same users order is divided into a group. Thus, it is a partial order relation between the user group and the data group. The partial order relation can be used to constitute a multilevel key management scheme [2]. In wireless network, the multicast network model is composed of three parts: SH (super host), BS (base station), MH (mobile host). SH is connected to BS through a wired connection, BS and MH are wireless connection. Wireless network also has the problem of multilayer multicast and different access levels of users. However, the wireless network and wired network model are very different, the users move back and forth between different cells in wireless network, so the scheme of the cable network cannot be applied directly to wireless network. In wireless network, the key management issues of multilayer multicast informat
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