Method for secure communication of wireless sensor network based on combined password

Abstract

The invention discloses a method for secure communication of a wireless sensor network based on a combined password, belonging to the field of secret communication. The method comprises the following steps that a base station sets and exposes system parameters and respectively generates public and private key pairs (QU, SU) and (QI, SI) for a user U and a node I; when the user is communicated with the sensor node, the user utilizes SU and QI to carry out signature and encryption on K1 in sequence based on a preset session key K1, and then the user sends a ciphertext to a receiving end, and the receiving end utilizes SI and QU to carry out decryption and verification in sequence; and lastly, the user utilizes the session key K1 to realize secure communication. When the sensor node needs to be communicated with the user, the node still utilizes SI and QU to carry out signature and encryption on a selected session key K2 in sequence, and then the user sends the ciphertext to the receiving end, and the receiving end still utilizes SU and QI to carry out decryption and verification. According to the method, secure communication of the wireless sensor network is realized by utilizing a combined public key password, so that the storage requirements for identity information and the cost for the base station to produce a private key are greatly reduced.

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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