Long-time request position privacy protection method based on road network prediction

Abstract

The invention discloses a long-time request position privacy protection method based on road network prediction. The method mainly solves the problems of position privacy protection and service quality optimization in services based on positions. The method includes the steps that a road network model is built; a target user sends requests; an initial anonymous area is calculated; an optimal moment is predicted; an anonymous region area is calculated; information is uploaded, and a result is sent back. According to the method, a method for predicting user positions and a method for position privacy protection are ingeniously combined, the new concept of the probability position is put forward and used for predicting an anonymous region, only one user position needs to be extracted each time, service cost is reduced, and continuous query attacks are effectively resisted. By dynamically predicting the user positions, the optimal anonymous moment is successfully predicted, the area of the anonymous region is reduced, and better-quality services are provided.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a long-term request location privacy protection method based on road network prediction in the technical field of information security. The invention can dynamically predict the user's subsequent position to obtain a smaller anonymous area, and improves the service quality for the user on the basis of protecting the privacy of the user's position from being leaked. The invention can be used for location privacy protection and service optimization of a location-based service system. Background technique [0002] With the rapid development of mobile network and cloud computing, the user's location information can be used to provide related services to users, that is, location-based services (LBS) have attracted widespread attention and applications. In an LBS request, the user must upload his exact location, which may cause the disclosure of his privacy. In order to s...

AI Technical Summary

Problems solved by technology

The disadvantages of this patent application are: frequently changing pseudonyms and pseudonym certificates for users will bring a lot of service costs; and this method is vulnerable to continuous query attacks, so as to determine the corresponding pseudonym of the user

The disadvantage of this patent application is: the anonymous area composed of road sections is only an area that basically meets the needs of users, and cannot provide high service quality, and with the increase of anonymous demand, the accuracy of the service is getting lower and lower

Images