Pair secret key management method suitable for clustering wireless sensor network model

Abstract

The invention relates to a pair secret key management method suitable for a clustering wireless sensor network model, and belongs to the technical field of wireless communication. The method employs acombined public key-based algorithm to generate a pair secrete key. In the process of mutually authenticating identity identifiers of two parties, identity identification authentication between a cluster head and an intra-group node is completed by utilizing a combined private key generated by the identity identifiers, a ciphertext formed by encrypting the identity identifiers and an authentication code generated by system time; in secret key updating, updating of the combination matrix of the intra-group nodes is dynamically distributed by each group of cluster head nodes. The intra-group node completes the identification of the legality of the key updating command by utilizing the hidden witness in the key updating message. According to the method, the calculation overhead and the storage overhead of the whole network are reduced, the pair secret key management of the clustering wireless sensor network model in the true sense is realized, the forward security and the backward security of the whole network are ensured, and the security and the reliability of the wireless sensor network during operation are improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a key management method suitable for a clustered wireless sensor network model. 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, sensor networks have been widely used in data collection, 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. There are problems such as replay attack, forgery attack and message hijacking in unicast communication, so the problem of secure unicast has become one of the key issues restricting the development of WSN. [0003] Althou...

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Problems solved by technology

[0003] Although the current research on key management in sensor networks has achieved a variety of secure unicast communications to a certain extent, they have not fully considered the dynamic changes of wireless sensor networks (for example, due to the limited resources of sensor nodes, the Exhaustion of energy consumption makes it necessary 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 have not been implemented. Mutual authentication between the network access node and the cluster head node does not realize the legitimacy authentication of the key update command issued by the cluster head by the group member nodes, so there is a certain security risk in the key management mechanism

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