Privacy Preservation Method Based on Dynamic Location Association

Abstract

The invention discloses a privacy protection method based on dynamic position association, and mainly solves the problem of user privacy disclosure in the prior art. According to the scheme, a query user sends a query request to an anonymous server; After receiving the request, the anonymous server firstly calculates and inquires the maximum movement boundary of the user, and then obtains the maximum reachable boundary of each user and the intersection of the maximum reachable boundaries; the possible Euclidean distance at the previous moment is predicted, and the current Euclidean distance, the reputation of each user and the number of high-low reputation users are calculated; Finally, user information with the highest overall reputation, more high-reputation users and small anonymous area and real user information are combined to form a final query set to be sent to a position server; After receiving the information, the position server forms a candidate result set and returns the candidate result set to the anonymous server; And the anonymous server screens results required by the real users and returns the results. According to the method, a reputation evaluation and distance prediction mechanism is adopted, the user credibility and availability are ensured, position injection attacks are resisted, and the method can be used for various continuous position query services.

Description

technical field [0001] The invention belongs to the field of wireless network security, and in particular relates to a privacy protection method, which can be used in various continuous location query services and mainly resists location injection attacks. Background technique [0002] Location service LBS, also known as positioning service, is a value-added service provided by the combination of mobile communication network and satellite positioning system. It obtains the location information of the mobile terminal through a set of positioning technologies, such as longitude and latitude coordinate data, and stores the location The information is provided to the mobile user himself, other people or the communication system to realize various location-related services. [0003] Location-based services can be applied in different fields. At the same time, under the trend of the rapid development of the mobile Internet, various applications are also flourishing. In particular...

AI Technical Summary

Problems solved by technology

However, this method only achieves a rough evaluation of user reputation, without considering the correlation between user dynamic motion patterns, so it is difficult to accurately quantify and evaluate user reputation in continuous query scenarios; at the same time, how to effectively evaluate user reputation from other perspectives and What kind of user reputation evaluation mechanism to establish? These issues have not been well resolved. Therefore, under the traditional k-anonymity privacy protection system, there is still a great risk of user privacy leakage, which seriously violates user security interests.

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