Track privacy protection method based on position service

A location-based service and privacy protection technology, applied in the field of information technology security, can solve problems such as the absence of a trusted third party, performance bottlenecks, and inability to make full use of surrounding environment knowledge, so as to avoid single-point attacks, reduce risks, and protect real-time tracks Privacy Effects
CN110602145AActive Publication Date: 2019-12-20HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN ENG UNIV
Publication Date
2019-12-20

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Abstract

The invention discloses a track privacy protection method based on position service. The method comprises the following steps: step 1, generating a fuzzy region BA according to a real position location of a user; 2, replacing the real position location of the user with a fuzzy region BA, randomly selecting an anonymous server from a plurality of anonymizers, and sending a query request (id, BA, t,query, k) to the anonymous server; 3, after the anonymous server receives the request information sent in the step 2, a selecting position point Li in a fuzzy area BA according to a road network; 4,enabling the anonymous server to generate an anonymous query request according to the Li generated in the step 3; and step 5, sending an anonymous query request to the location service provider. The real-time trajectory privacy protection method is researched on the basis of a multi-anonymizer system structure privacy protection model, and a method of combining location ambiguity and K-anonymity is provided, so that the purposes of enhancing trajectory privacy protection and ensuring data availability are achieved.
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Description

technical field

[0001] The invention belongs to the technical field of information technology security; in particular, it relates to a track privacy protection method based on location services. Background technique

[0002] In recent years, with the continuous development and application of mobile smart devices, location-based services (Location-based Service, LBS) have been widely used, which greatly facilitates people's lives. Users need to provide their own location information when obtaining LBS services, so a large amount of spatio-temporal location information, that is, trajectory data, will be generated in the continuous query process. Attackers can infer users’ private information, such as users’ hobbies, by mining trajectory data. , political beliefs, physical health status, etc. Therefore, a real-time trajectory privacy protection technology is proposed on the basis of location privacy protection technology.

[0003] In order to solve the problem of trajectory pr...

Claims

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