Group key management method applicable to heterogeneous sensor network

Abstract

The invention provides a group key management method applicable to a heterogeneous sensor network. The method is that the distributive key management mode is performed; key materials of nodes in the group are dynamically distributed by a leader of each group; when networking, the leader and the nodes in the group are identified according to an exclusive NOR identification mechanism; when constructing the group key, the leader generates a witness for members in each group through an one-way accumulator; when updating the group key, three key update mechanisms are provided, namely, the mechanism of timely updating the group key, the mechanism of updating the group key while adding a new node, and the mechanism of updating the group key when repealing the old nodes; the nodes in the group utilize the concealed witness in a group key update message to identity a group key update instruction. With the adoption of the method, the calculation cost and storage cost of the whole network can be reduced; the real distributive management mode can be achieved; in addition, the forward security and the backward security of the whole network can be ensured; the safety and reliability of the wireless sensor network in operation can be improved.

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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