Cross-cluster asymmetric group key negotiation method in wireless sensor network

Abstract

The invention provides a cross-cluster asymmetric group key negotiation method in a wireless sensor network. The method comprises steps as follows: an allied and shared key between clusters is established, cluster heads are taken as bridging nodes, and sensor nodes of different nodes have the same group key factor information; an asymmetric computation algorithm is designed in the group key negotiation process, more computation and communication traffic of the sensor nodes are migrated to the cluster head nodes with larger energy, and the lightweight property of computation and communication overhead of the sensor nodes is ensured; self-certification property of keys is realized, additional communication rounds are not required, the sensor nodes can self-certify the correctness in computing the group keys, and the correctness and the safety of the group key negotiation are guaranteed. Group key negotiation of the sensor nodes distributed in different clusters in the wireless sensor network is realized, a safe communication channel is established, the scale of cooperative computation and information sharing of sensor node groups is further expanded, energy consumption of the sensor nodes is reduced, and the service life of the sensor nodes is prolonged.

Description

technical field [0001] The present invention relates to the technical field of information security and cryptography, in particular to a cross-cluster asymmetric group key negotiation method in a wireless sensor network, and to a technology for exchanging and transmitting secret information among group members. Cross-cluster asymmetric group key agreement for cross-cluster information exchange and secure transmission among sensor node groups in network environment. Background technique [0002] Group key agreement in wireless sensor networks is the group encryption and decryption keys required for secret communication between groups that sensor node members jointly calculate to ensure communication security. One of the key technologies for secure collaborative computing, resource sharing, and information exchange over the Internet. Sensor networks are widely used in national defense, industry, agriculture, etc. It is very important to ensure the confidentiality, integrity a...

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Problems solved by technology

[0004] Aiming at the technical problem that wireless sensor nodes cannot directly establish long-distance and large-scale inter-group secret communication channels in the application environment of wireless sensor networks, the present invention proposes a cross-cluster asymmetric group key in wireless sensor networks The negotiation method, through the bridging function of the cluster head, establishes a secure and secret communication channel between the sensor group nodes distributed in different clusters to ensure the safe and secret communication between the group nodes, and through the key factor function mapping relationship, the sensor nodes in Without a third party or additional communication, it can verify the correctness of the group key it calculates, reducing the number of rounds of group key negotiation, thereby saving the communication consumption of sensor nodes

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