Location privacy protection method based on coordinate transformation

Abstract

The invention relates to a location primary protection method based on coordinate transformation. The location privacy protection method comprises the following steps: I, distributing coordinate transformation parameters for a user and a location server through a parameter generator; II, performing coordinate transformation on location coordinates by coordinate transformation parameters and imitating a location service request to an anonymous server by the user; III, establishing an anonymous group and an anonymous area according to the transformed location coordinates through the anonymous server to generate and send a location service anonymous request to the location server; IV, performing inverse coordinate transformation on location coordinates through the location server, performing inquiry processing and returning query results to the anonymous server after performing coordinate transformation; V, performing secondary refinement on the query results and returning the refinement results to the user by the anonymous server; and VI, performing another inverse coordinate transformation on the results received by the user to obtain true location query results. The location privacy protection method can be used for improving the safety of a location information service.

Description

technical field [0001] The invention belongs to the technical field of location information services, and in particular relates to a location privacy protection method based on coordinate transformation, which can be applied to various location-based information services such as navigation, social interaction, and surrounding query. Background technique [0002] Location-based services (LBS, the English full name is Location Based Services) refers to the value-added service provided on the basis of obtaining the location information of mobile terminal users through the wireless network of telecom mobile operators or other positioning methods (such as GPS). Serve. Due to the development of positioning technology, such as the use of GPS, services based on location information are developing very rapidly. Ordinary users can enjoy location-based services through handheld devices, such as mobile phones and tablet computers. Location-based services can provide a variety of Inform...

AI Technical Summary

Problems solved by technology

However, the newly introduced anonymous server can obtain accurate location information of each user, so it is still a security weakness or hidden danger of the system

If there is a security breach in the third-party anonymous server, there is still a security threat to the user's location privacy

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