Sybil attack node detection method and device considering sensor error

Abstract

The invention discloses a detection method and device for a sybil attack node considering sensor errors, relates to the technical field of vehicle-mounted network security, and solves the technical problem that the vehicle-mounted network detects a sybil attack node inaccurately. The CAM message broadcast by the neighbor node, the pre-detection device fuses the sensor error to judge the rationality of the communication range of the vehicle node; the pre-processing device uses Gaussian filtering to filter and optimize the node RSSI sequence with a reasonable communication range; the detection device uses the DTW algorithm to measure the node RSSI sequence The spatial difference and time difference between the mobile sequence and the witch node in the neighbor node are found. While detecting malicious behavior in the vehicle ad hoc network in real time, the inherent physical acquisition error of the sensor is considered, which improves the rationality of the detection process; greatly reduces the calculation load of the DTW detection algorithm and shortens the detection time.

Description

technical field [0001] The present disclosure relates to the technical field of vehicle network security, in particular to a detection method and device for Sybil attack nodes considering sensor errors. Background technique [0002] As a branch of the Internet of Things, VANET (Vehicular ad-hoc network) is considered to be the basis of vehicle-to-vehicle communication. After the vehicle obtains the state of itself and the environment (such as speed, position, congestion, and sudden accidents, etc.) through various sensors, it stores it in its own database, and continuously broadcasts to the outside while exchanging information with other vehicles. VANET and its applications facilitate people's travel, relieve traffic pressure, and help achieve the goals of accuracy, efficiency, safety, and energy saving. [0003] As more and more VANET products are planned to be put into the market, ensuring their communication security has become a very important issue. Manufacturers not o...

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Problems solved by technology

[0004] However, the existing research on Sybil attack node detection has obvious limitations and deficiencies

First of all, most of the existing research does not take into account the inherent physical measurement error when the sensor receives the signal; secondly, most of the existing research methods have problems such as increasing communication pressure, reducing communication efficiency, and leaking user privacy.

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