Improved key distribution method in large-scale layered wireless sensor network

Abstract

The invention discloses an improved key distribution method in a large-scale layered wireless sensor network, relates to the technical field of a wireless ad hoc network, and specifically relates to an improved key distribution scheme for establishing the safe layered wireless sensor network. For the problem that the key storage and communication overheads of the traditional key pre-distribution mechanism are relatively high, the invention provides the method of ensuring complete network connection by employing the improved key distribution scheme. The wireless sensor network is usually deployed in a hostile environment and an unmanned operation mode, and therefore, in order to protect sensitive data and sensor reading, a secret key should be applied to encryption of exchange information between communication nodes. According to the method, a layered network mode and a bivariate polynomial key generation scheme are employed, no matter how many sensors are damaged, through adoption of the IKDS (Improved Key Distribution Scheme), a unique paired key is ensured to be established between two communication parties. According to the improved key distribution scheme, the key storage and communication overheads are reduced, the security is improved, and the integral stability of the network data transmission is improved. The method is applicable to the technical field of the large-scale layered wireless ad hoc network.

Description

technical field [0001] The invention relates to the technical field of large-scale layered wireless ad hoc networks, in particular to an improved key distribution method for establishing a secure layered wireless sensor network. Background technique [0002] In recent years, with the improvement of microelectromechanical systems (MEMS) technology, large-scale wireless sensor networks have been widely used in various scenarios, such as object tracking, environmental monitoring, and data acquisition. Usually, a wireless sensor network is composed of a large number of sensor nodes, and each sensor node is a small, cheap wireless device with limited battery power, storage space, data processing capability, and short wireless transmission range. Depending on the sensing units equipped, wireless sensor nodes can measure various physical properties such as sound, temperature, pressure, etc. Many wireless sensor nodes are organized into clusters to track specific objects or monitor...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the traditional key distribution mechanism in the existing large-scale layered wireless sensor network environment has large key storage and communication overhead and poor overall stability of network data transmission, which seriously affects the security performance of the network.

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