A method for secure communication of wireless sensor network based on combined cipher

Abstract

The invention discloses a method for secure communication of a wireless sensor network based on a combined cipher, which belongs to the field of secure communication. The invention includes: the base station sets and discloses system parameters, and the base station generates public and private key pairs (QU, SU) and (QI, SI) for the user U and the node I respectively. When the user communicates with the sensor node, based on the preset session key K1, the user uses SU and QI to sign and encrypt K1 in turn, and then sends the ciphertext to the receiving end, which uses SI and QU to decrypt and verify in turn. Finally, the user can use the session key K1 to realize secure communication. When the sensor node needs to communicate with the user, the node still uses SI and QU to sign and encrypt the selected session key K2 in turn, and then sends the ciphertext to the receiving end, which still uses SU and QI to decrypt and verify. The invention realizes the secure communication of the wireless sensor network by using the combined public key cipher, and greatly reduces the storage requirement of the identity information and the cost of producing the private key by the base station.

Description

technical field [0001] The invention belongs to the technical field of secure communication, and in particular relates to a method for secure communication of a wireless sensor network based on a combined cipher. Background technique [0002] Wireless sensor network (WSN) is composed of a large number of micro-sensor nodes deployed in the monitoring area. It is a multi-hop self-organizing network system formed by wireless communication. The main purpose is to perceive, collect and process the perceived objects in the network coverage area. information and send it to observers. The Internet of Things finally perceives the entire material world through sensors spread all over every corner and objects and the wireless sensor network composed of them. A sensor network system usually includes sensor nodes and aggregation nodes, where the sensor nodes have relatively weak computing and storage capabilities, and are powered by small-capacity batteries. The aggregation node has re...

AI Technical Summary

Problems solved by technology

However, this scheme only implements authentication, and does not implement confidentiality protection for data.

[0007] (4) The identity-based offline and online signature scheme solves the security problems of wireless sensor networks. The offline and online methods can greatly reduce the computing cost, which is suitable for resource-constrained environments in wireless sensor networks, but it does not solve the problem of message signatures in wireless sensor networks. confidentiality issues

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