WSN pair key management method suitable for unicast communication

Abstract

The invention relates to a WSN pair key management method suitable for unicast communication, and belongs to the field of network security and communication, and the method comprises the following steps: S1, initializing system parameters; S2, enabling two communication parties to mutually authenticate identities; S3, constructing space coordinates of the shared matrix M; s4, enabling the two communication parties to establish a pair key; s5: updating the key. According to the method, on the basis of reducing the storage overhead of each node, the establishment of the pair key and the updatingof the pair key are completed, the dynamic distribution of the pair key management scheme coefficient based on the symmetric polynomial is realized, the security threshold problem of the symmetric polynomial pair key management scheme is overcome, meanwhile, the forward security and the backward security in the whole network operation process are ensured, the key connectivity is relatively high,the network expansion performance is good, and the capability of resisting malicious attacks is very strong.

Description

technical field [0001] The invention belongs to the field of network security and communication, and relates to a WSN pair key management method suitable for unicast communication. Background technique [0002] The wireless sensor network is composed of a large number of wireless sensor nodes deployed to the monitoring area, mainly for sensing and collecting information. At present, wireless sensor networks have been widely used in military monitoring, environmental monitoring, medical applications, intelligent transportation, robot control, remote control of dangerous areas and other fields. In WSN, except for some special cases that require multicast communication, wireless sensor networks are more point-to-point unicast communication between nodes. Because unicast communication has problems such as replay attack, forgery attack and message hijacking, the problem of secure unicast has become one of the key issues restricting the development of WSN. [0003] Although the ...

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Problems solved by technology

[0003] Although the current research on key management schemes for wireless sensor networks has achieved a variety of secure unicast communications, they have not 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 causes it to exit the network, such a process will inevitably lead to dynamic changes in the network), so that the entire scheme lacks a key update mechanism; although some key management schemes have a key update mechanism, they do not implement the network node Mutual authentication with the cluster head node, and the group member nodes have not implemented the legality authentication of the key update command issued by the cluster head, so there is a certain security risk for the key management mechanism

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