Group Key Management Scheme In Wireless Mobile Networks

In recent years, the wireless mobile network has been used widely. Security is notonly the fundamental problem about it, but also one of the hot areas in this kind of network.Currently, the security techniques in wireless mobile network mainly consist of securerouting, secure group communication, authentication and key management ect. Groupcommunication makes the information transmitted efficiently in the network, which is animportant means to improve the utilization of network resources and secure groupcommunication needs the supports of group key management. Therefore, the study ofgroup key management in wireless mobile network is of great significance.The traditional group key management doesn't account for the difficulties caused bythe characteristics of wireless mobile network, so it can't be applied directly. Based on theanalyses of the limitations of the traditional group key management, this paper focuses ona new kind of group key management applicable to wireless mobile network-theself-healing group key management. It's characterized by the self-healing capability in thenodes, good adaptation about group members' dynamic changes, small communicationoverheads when key updates and loose request for computation capability. However, it'slimited by the number of rekeying and its centralized management model doesn't meet thelarge-scale network's needs very well. Hence, this paper introduces the asynchronousupdate strategy of nodes' private key, the digital signature technology and distributedmanagement framework to one representative of the self-healing group key management,expands the finite rekeying to infinite and enhances the ability to resist attacks, which ismore applicable to the large-scale wireless mobile network.