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Query track privacy protection method

A privacy protection and trajectory technology, applied in security devices, electrical components, transmission systems, etc., can solve the dilemma of privacy risk and service quality, and achieve the effect of reducing the number of queries, ensuring service quality, and solving conflicting problems

Active Publication Date: 2019-03-01
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the dilemma of privacy risk and service quality in continuous query, the purpose of the present invention is to provide a query track privacy protection method

Method used

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Embodiment Construction

[0036] Such as figure 1 Or shown in 2, a kind of query track privacy protection method of the present invention, it comprises the following steps:

[0037] Step 1. The location server grids the map of the city, calculates the service similarity of each adjacent grid, and merges the adjacent grids with a service similarity of 1 into the same area to generate a similar map;

[0038] Further, step 1 specifically includes the following steps:

[0039]Step 1-1, the location server grids the map of the city, and calculates the Euclidean distance between the center point of each grid and all points of interest; the location server has the coordinates of all points of interest, and the location server uses an algorithm to traverse the grid map , take the m interest points of the Euclidean distance between each grid and all interest points for comparison. Interest points are terms in geographic information systems, which generally refer to all geographical objects that can be abstract...

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Abstract

The invention discloses a query track privacy protection method, which is used for solving the privacy problem of continuous location service queries. Firstly, two query strategies of random locationsand suppression are designed on the basis of a service similarity principle, the problem of contradiction between quality of location services and privacy protection is solved, that is, service similarity is introduced for partitioning a map, when a user firstly requests a service in an area, a location is randomly selected in the same area to replace a real location thereof for requesting the service from a location server, then all subsequent queries in the same area are suppressed, and a result of a first query is directly utilized as a current query result; and secondly, a differential privacy protection method is introduced for controlling time intervals of cross-region queries, location privacy security of the cross-region queries is ensured, and the location correlation problem caused by short-time cross-region queries is solved.

Description

technical field [0001] The present invention relates to the field of location-based services (Location-based Services, LBS), in particular to a privacy protection method for query tracks. Background technique [0002] In recent years, with the increasing popularity of smart terminals with positioning functions and wireless communication, various location-based information services (such as finding nearby points of interest) are developing rapidly, covering all aspects of people's lives. Since location data contains a large amount of personal information, such as travel purposes, behavior habits, hobbies, religious beliefs, home addresses, health conditions, and social relationships, improper use of location data may lead to personal privacy disclosure. Moreover, the more accurate the location information provided and the higher the service quality obtained by the user, the higher the risk of the user's location being leaked. Especially when LBS is used continuously, due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08H04W4/029H04W12/02
CPCH04L63/107H04W4/029H04W12/02H04L67/52
Inventor 叶阿勇孟玲玉
Owner FUJIAN NORMAL UNIV
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