A method for determining the location of malicious APs based on simple gestures

Abstract

The present invention provides a method for determining the location of a malicious AP based on simple gestures. The CSI information of three locations is collected at the receiving end, and the movement path of the gesture during the collection process is a semicircle; the measurement direction is adjusted to identify whether there is an LOS path; For the Neil cutting point, first perform CSI preprocessing, and then perform a linear fitting peak-finding algorithm to obtain the trough of the first Fresnel area cutting, and then obtain the position of the Fresnel cutting point; then judge the relative direction and use gestures to start During the movement, the correlation of 30 subcarriers in the time domain increases, and the direction is corrected; finally, the CSI data collected at three locations is taken out, and the intersection coordinates of three straight lines are taken according to the location coordinates and directions, and the maximum line-of-sight path is used. The magnitude-weighted centroid algorithm computes the final AP position. The detection method of the invention is simple, requires less manpower and material resources, and has low cost, while improving the detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to a method for locating a Wi-Fi signal source, and in particular relates to a method for determining the position of a malicious AP based on a simple gesture. Background technique [0002] The leakage of private information caused by malicious APs (Access Points) in public places is increasing day by day, and it is particularly important to obtain the locations of malicious APs. Existing AP positioning methods can be divided into three categories: based on special hardware, based on received signal strength (RSS), and based on channel state information (CSI). [0003] Existing AP positioning mainly deploys professional infrastructure (e.g., multiple sniffers) or dedicated hardware (e.g., directional antennas) in suspicious areas, and can use signal contours based on signals received by multiple sniffers. Figure to estimate the location of rogue AP (D.Schweitzer, W.Brown, ...

AI Technical Summary

Problems solved by technology

The above method has the following disadvantages: one is that the cost of manpower and material resources is too high; the other is that the test accuracy is not enough; the third is that the test method is complicated

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