Privacy protection method and device for Wifi fingerprint positioning

Abstract

The invention relates to a privacy protection method and device for Wifi fingerprint positioning. The privacy protection method for Wifi fingerprint positioning comprises the following steps that a server extracts all the Wifi fingerprints and fingerprint metadata; a client terminal collects Wifi signal intensity values in the peripheral environment and generates a public key and a private key according to the asymmetrical encryption algorithm, encryption is respectively conducted on the collected Wifi signal intensity values by the public key and a positioning request is sent to the server; the server calculates the fingerprint distance between all the Wifi fingerprints and each encrypted Wifi signal intensity value and transmits multiple sets of encrypted fingerprint distance data to the client terminal; the client terminal uses the private key to decrypt the multiple sets of the encrypted fingerprint distance data, and determines the current location of the client terminal according to the Wifi fingerprint corresponding to each decrypted fingerprint distance datum and the received fingerprint metadata. The privacy protection method and device for Wifi fingerprint positioning solves the privacy problem in an existing WiFi fingerprint positioning technology, and can protect the location privacy of a user and the data privacy of a service provider.

Description

technical field [0001] The invention relates to indoor positioning and privacy protection technology, in particular to a privacy protection method and device for Wifi fingerprint positioning. Background technique [0002] With the continuous expansion and deepening of wireless network, mobile communication and pervasive computing technology applications, location-based services (LBS, Location-based Services) are becoming more and more important. Positioning technology, as the basis of location-aware computing and location-based services, has attracted extensive attention from researchers all over the world. In an indoor environment, terminal devices such as mobile phones cannot receive GPS signals, so indoor positioning technology has become a research hotspot. WiFi fingerprint localization technology is one of the most commonly used indoor localization techniques, which has attracted extensive attention from academia and industry. Companies such as Google, Apple, Navizon,...

AI Technical Summary

Problems solved by technology

On the other hand, because the training process of the WiFi fingerprint library is very time-consuming and labor-intensive, and the quality of the WiFi fingerprint library directly affects the positioning accuracy, service providers are unwilling to disclose their own WiFi fingerprint database.

If a malicious user obtains the WiFi fingerprint library, it can build its own positioning system, or sell the fingerprint library to the service provider's competitors, causing the service provider to suffer from unfair competition

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