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Link cluster graph based semantic position privacy protection method

A technology of privacy protection and semantic location, which is applied in the field of network security and privacy protection, can solve the problems of inability to guarantee the anonymous set structure, slow anonymous speed, low service quality, etc., and achieve the goal of reducing anonymous time, increasing success rate, and improving query efficiency Effect

Active Publication Date: 2017-06-20
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

In the existing semantic-sensitive location privacy protection methods, there are generally problems of low anonymity success rate and slow anonymization speed, and the structure of the anonymity set cannot be guaranteed, which brings a large query delay to the location server, and the anonymous server is relatively high. refinement delay, resulting in lower quality of service

Method used

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  • Link cluster graph based semantic position privacy protection method
  • Link cluster graph based semantic position privacy protection method
  • Link cluster graph based semantic position privacy protection method

Examples

Experimental program
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Embodiment

[0027] The present invention adopts such as figure 1 The system structure based on a trusted third party is shown. The system is mainly divided into three parts: LBS users, anonymous servers, and location servers. LBS users are location service requesters, and anonymous servers execute anonymous algorithms to protect user requests. Service provider, responding to requests protected by anonymity.

[0028] A kind of semantic position privacy protection method based on edge cluster graph provided by the present invention is described in detail below, for convenience of description, at first make following definition:

[0029] Definition 1: (user privacy preference profile) The privacy preference sent by the user to the anonymous server is expressed as profile=(k,l,θ,v,l max );

[0030] Among them, k, l, and θ respectively indicate that the anonymous set needs to contain at least k users and l road sections, θ is the user sensitivity threshold, that is, the ratio of the sum of t...

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Abstract

The invention discloses a link cluster graph based semantic position privacy protection method. The method comprises the following steps that 1) a users sends a present position, user privacy preference and the type of a request interest point to an anonymous server; 2) the anonymous server executes an anonymous algorithm to obtain an anonymous set; 3) the anonymous server sends an anonymous request to a position server; 4) the position server carries out query, and returns a query result to the anonymous server; and 5) the anonymous server carries out refinement on the query result, and returns a refinement result to a user. The method has the advantages that the success rate of anonymous request protection of the anonymous server is improved, anonymous time is reduced, and the query efficiency of the position server is improved.

Description

technical field [0001] The invention belongs to the field of network security and privacy protection, in particular to a semantic location privacy protection method based on an edge cluster graph. Background technique [0002] With the development of positioning technology and the popularization of mobile devices, location-based services (Location Based Service, LBS) have brought a lot of convenience to people's lives, such as querying nearby restaurants, querying nearby bars, or sending notifications when arriving at a specified location, etc. Requests are based on Location-based services are increasingly becoming a part of people's lives. However, while users enjoy the convenience brought by location-based services, there is also the risk of privacy leakage. Users need to send service requests and their own location information when using location-based services. If the location server is attacked or the service provider sends the data For other commercial purposes, the u...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
CPCH04L63/0421H04L67/52
Inventor 徐红云田凯郑耀辉张勇徐成
Owner SOUTH CHINA UNIV OF TECH
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