A group key management method suitable for heterogeneous sensor networks

Abstract

The invention claims to protect a group key management method suitable for heterogeneous sensor networks. The method adopts a distributed key management mode, and the key materials of nodes in the group are dynamically distributed by the group leaders. In the process of networking, use the same-or-based authentication mechanism to complete the identification between the group leader and the nodes in the group; in the process of establishing the group key, the group leader uses a one-way accumulator to generate a witness for each member in the group; In the stage of group key update, three key update mechanisms are proposed, such as regular group key update, group key update when new nodes join, and group key update when old nodes withdraw. The hidden witness completes the authentication of the group key update command. This method not only reduces the computing overhead and storage overhead of the entire network, realizes a real distributed management method, but also ensures the forward security and backward security of the entire network, and improves the security of the wireless sensor network during operation. sex and reliability.

Description

technical field [0001] The invention relates to a group key management method suitable for a wireless sensor network, which belongs to the application field of wireless sensor network technology and cross-technology of network information security. Background technique [0002] Wireless sensor networks (WSN, wireless sensor networks) have attracted more and more attention due to their broad application prospects, but due to their limited resources, unsafe working environment and low-cost requirements, security issues have always been It is a hotspot of academic research. With the rapid development of WSN, its application scope is also more and more extensive. At present, the existence of WSN is indispensable in the military and people's daily life. In WSN, in addition to point-to-point unicast communication, multicast communication is also required, but multicast communication has the characteristics of open channels, and compared with unicast communication, it is more lik...

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Problems solved by technology

[0002] Wireless sensor networks (WSN, wireless sensor networks) have attracted more and more attention due to their broad application prospects, but due to their limited resources, unsafe working environment and low-cost requirements, security issues have always been is a hotspot of academic research

In WSN, in addition to point-to-point unicast communication, multicast communication is also required, but multicast communication has the characteristics of open channels, and compared with unicast communication, it is more likely to be attacked by malicious nodes, so the problem of secure multicast has become One of the key issues restricting the development of WSN

[0003] Although the current research on group key management in sensor networks has achieved secure multicast communication to a certain extent, they may not have fully considered the dynamic changes of wireless sensor networks (for example, due to the limited resources of sensor nodes, the energy consumption of nodes Exhaustion makes it necessary to exit the network, and the exit of old nodes must have new nodes to maintain the operation of the network. Such a process will inevitably lead to dynamic changes in the network), which makes the cost of group key update in the whole scheme too high, even without Group key update mechanism; although some group key management schemes have a group key update mechanism, they do not implement mutual authentication between network access nodes and group leaders, nor do group member nodes issue key updates to group leaders command for legality authentication, so the group key management mechanism has certain security risks

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