Sybil attack node detection method and device considering sensor errors

Abstract

The invention discloses a Sybil attack node detection method and device considering sensor errors, relates to the technical field of vehicle-mounted network security, and solves the technical problemthat the detection of a Sybil attack node by a vehicle-mounted network is not accurate enough. The main points of the technical scheme of the invention are that the method comprises the steps that aninformation acquisition device receives a CAM message broadcast by a neighbor node; a pre-detection device fuses sensor errors to judge the rationality of the vehicle node communication range; a preprocessing device performs filtering optimization processing on a node RSSI sequence with a reasonable communication range by using Gaussian filtering; a detection device uses a DTW algorithm to measurethe spatial difference and the time difference between a node RSSI sequence and a moving sequence so as to discover Sybil nodes in neighbor nodes. While malicious behaviors in the vehicle-mounted adhoc network are detected in real time, inherent physical acquisition errors of the sensor are considered, and the rationality of the detection process is improved; the calculation load of the DTW detection algorithm is greatly reduced, and the detection time is shortened.

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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