Detection method for Sybil attack of wireless network based on channel state characteristics

Abstract

The invention discloses a detection method for a Sybil attack of a wireless network based on channel state characteristics. The method comprises the following steps of (1) collecting signal state characteristic information of each client by a central detection AP, eliminating a phase deviation and a time deviation in the channel state characteristics by utilizing a self-adaptive MUSIC algorithm, meanwhile, computing an angle of arrival of a sight distance route by applying a spatial smoothing MUSIC algorithm through a receiving phase, and distinguishing angle signals transmitted by different APs by comparing different RSSI values; (2) detecting the Sybil attack and a Sybil node through combination of the angle of arrival and the signal strength, and distinguishing whether the node is underthe Sybil attack or not through comparison with the actual sending angle of arrival (AoA) and the RSSI; and (3 ) constructing a Sybil attack detection model system, carrying out experiments on the APand mobile equipment at different angles, meanwhile, computing the angle and carrying out simulation experiment on the Sybil attack, and detecting the Sybil node and the Sybil attack. According to the method, the Sybil node and the Sybil attack in the wireless network can be accurately detected, and the detection efficiency is 98%.

Description

technical field [0001] The invention relates to the fields of wireless network security technology and indoor positioning, in particular to angle detection of accessible nodes and Sybil attack detection in wireless networks. Background technique [0002] The key factor of wireless network security is whether it can effectively avoid eavesdropping. Due to the broadcast characteristics of wireless channels and the one-way authentication mechanism of accessible nodes, even though the 802.1i security protocol is used, it cannot effectively resist a node masquerading as multiple node identities Sybil attack, which leads to the leakage of node information. However, the channel state signature (CSI) and MIMO technology of the physical layer ] Combining can provide more and more accurate wireless network channel characteristics. [0003] The Sybil attack was first proposed by J.RDouceur. The attacker tries to forge multiple node identities in a certain area. These nodes can not on...

AI Technical Summary

Problems solved by technology

Such channel-based detection relies too much on limited spatial in

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