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Method and system for protecting location service privacy based on grid density

A privacy protection and location service technology, applied in the field of grid density-based location service privacy protection methods and systems, can solve the problems of infringing user privacy, usage, and high communication overhead, reducing leakage risks, improving privacy, and system low cost effect

Active Publication Date: 2015-05-13
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current methods are difficult to use in actual production and life due to high computational complexity, high communication overhead, or special equipment requirements.
[0005] In addition, if a mobile user continuously uses location services, the continuously uploaded location information has a high degree of temporal and spatial correlation. In this case, it is easier for an attacker to obtain the exclusive trajectory of a specific user through multi-target tracking and key path point matching. , and then guess the user's identity, which violates the user's privacy

Method used

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  • Method and system for protecting location service privacy based on grid density
  • Method and system for protecting location service privacy based on grid density
  • Method and system for protecting location service privacy based on grid density

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Embodiment Construction

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all examples. Based on the present invention All other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] In order to facilitate the understanding of the embodiments of the present invention, specific embodiments will be taken as examples for further explanation below in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

[0041] A system for location privacy protection based on grid density (referred to as this system).

[0042] like figure 1, the system includes a privacy protection ser...

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Abstract

The invention discloses method and system for protecting location service privacy based on grid density. The method comprises the steps of receiving a location query request of a user through a privacy protection server; creating and maintaining a user state table and a block information table based on a grid density model through the privacy protection server; finding out k adjacent cell covering the user as a location fuzzy area by the grid-based minimum inclusion region; assigning a pseudonym to the query request of the user; exchanging the pseudonyms of adjacent high-risk users according to the trajectory privacy measurement; transmitting the query request to a location service supplier server; filtering and returning the obtained query result to the query user.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a privacy protection method and system for location services based on grid density. Background technique [0002] In recent years, with the end of mobile communication, the development of Internet of Things technology and geographic information system, there are more and more applications of location-based services. Generally speaking, location-based service (Location Based Service, LBS) is that the user obtains the location information of the mobile terminal (such as longitude and latitude coordinates) through a set of positioning technologies, uses the mobile communication network to request location-related services, and obtains the information provided by the location-based service provider. Various location-related services for mobile users themselves or others and communication systems. Location-based services are widely used in location positioning, route navigat...

Claims

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Application Information

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IPC IPC(8): H04W12/02
CPCH04W4/021H04W12/02
Inventor 武发明刘佩林潘常春郁文贤邹耀
Owner SHANGHAI JIAO TONG UNIV
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