Privacy protection method in continuous real-time query scenario in location-based services

Abstract

The invention discloses a privacy protection method based on continuous real time inquiry scene in position service, mainly solving the defect that the existing position anonymous method is low in privacy protection degree. The realizing steps are as follows: 1, building a communication system frame composed of a user, positioning facility and a position server; 2, selecting a plurality of fake positions by the user for the first time by using a single point scoring function of positions; 3, composing an actual position and a plurality of fake positions into a position set by the user, sending to the position server; 4, selecting a plurality of fake positions by the user subsequently by using a continuous point scoring function among the positions, composing the actual position and a plurality of fake positions into a position set, and sending to the position server. According to the invention, through comprehensively considering the factors such as the access degree and access time distribution of the single point positions, the access sequence and access time distribution of the continuous positions, the position anonymity is realized by heuristically generating the fake positions, the position privacy of the user is effectively protected, and the invention is applicable to continuous position inquiry and navigation service.

Description

Technical field: [0001] The invention belongs to the technical field of wireless networks, relates to the protection of location privacy, and can be applied to continuous location query and navigation services. Background technique: [0002] Location-based service is a value-added service developed with the advancement of wireless network technology and the popularization of mobile terminals to provide users with location information. Using location-based services, users can more accurately and efficiently establish their own corresponding contacts with people or things around them, so as to better integrate into the surrounding environment. Find the nearest restaurant or bus station to you. [0003] However, while users enjoy the convenience brought by location-based services, their privacy may have been exposed to untrusted third parties. For example, the user sends a request to the service operator through the mobile phone at the bus station to inquire about the bank br...

AI Technical Summary

Problems solved by technology

The general location-based anonymity scheme mainly considers the privacy protection of a single location, and does not consider the scene of continuous real-time query. However, in daily life, users often perform continuous real-time query. In the face of operators and service providers, it is difficult for users to truly achieve the degree of privacy protection of k-anonymity for the single-point location privacy protection scheme

[0007] In the above methods, since the scenario of continuous real-time query in location-based services is not considered, when the operation service provider uses a large amount of side information it owns, such as query time, query times, and the sequence of query locations, etc., it is combined for analysis , the user's location privacy may be leaked, which may bring more security problems

Images