False location- and geometry-based location privacy protecting method in location service

A location service and fake location technology, applied in the field of information security, can solve problems such as high algorithm complexity, slow convergence speed, and inability to apply anonymity

Active Publication Date: 2015-07-22
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses an enumeration method when selecting K-1 fake positions. Although it ensures that the entropy value of the selected K positions is the largest, the algorithm complexity is high and the convergence speed is too slo

Method used

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  • False location- and geometry-based location privacy protecting method in location service
  • False location- and geometry-based location privacy protecting method in location service
  • False location- and geometry-based location privacy protecting method in location service

Examples

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Embodiment

[0050] This embodiment specifically adopts the following technical solutions:

[0051] A location privacy protection method based on pseudo location and geometry in location services, the specific process is as follows figure 1 shown, including the following steps:

[0052] Step 1. Initialization: In this method, the LBS server is a service provider, which stores the database of all services and is responsible for updating service data; when the user sends an LBS service request, the LBS server is responsible for receiving the user's service query request, and in the database Search for the corresponding service data in , and then feed back the search results to the user;

[0053] At the same time, in the area served by the LBS server, the LBS server is responsible for classifying each location according to its location attributes (such as restaurants, shopping malls, schools, etc.) The historical request probability of each location), and the LBS server can publish the hist...

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Abstract

The invention provides a false location- and geometry-based location privacy protecting method in a location service and belongs to the technical field of information safety. The method has the advantages that the method is based on a DLS algorithm and uses entropy to allow anonymization degree to be constant, side information which may be mastered by attackers is considered, and the relevance, namely semantic coefficient of locations and inquiry contents and time is also considered; meanwhile, whether the real location of a user contains in the location information in the request message generated by the method or not can be selected freely; due to the fact that the side information which may be utilized by the attackers and the relevance of the locations and inquiry contents and time are considered during false location selection, K anonymity can be achieved, the user can acquire the large-enough entropy, and the exposing probability of the real location of the user is lowered.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a location privacy protection method based on false locations and geometry in location services. Background technique [0002] With the rapid development of modern communication technology and mobile terminals, application systems based on location services have achieved great success. In recent years, because the location-based service (LBS) system can bring great convenience to people's life, it has quickly attracted people's attention and is widely used in various fields. In the LBS application system, people can easily initiate a request to the LBS server by using a handheld terminal (smart phone, tablet) to obtain the relevant information they want. However, while enjoying the convenience brought by location-based services to our lives, it also exposes many privacy and security issues. In location-based services, every time a request is made, the p...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W12/02
CPCH04W4/02H04W4/022H04W12/02
Inventor 廖丹黄勋辉李乐民孙罡李慧
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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