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A privacy protection method based on false location in location service

A location service and privacy protection technology, applied in the field of information security, to achieve the effect of reducing computing overhead, reducing the probability of exposure, and protecting location privacy

Active Publication Date: 2018-04-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method provided by the present invention is based on the DLS algorithm, and comprehensively considers the key issues when selecting a false location: not only considering the side information that may be mastered by the attacker, but also comprehensively considering the balance between the computational complexity of the user end and the user privacy requirements

Method used

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  • A privacy protection method based on false location in location service
  • A privacy protection method based on false location in location service
  • A privacy protection method based on false location in location service

Examples

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Embodiment Construction

[0028]This specific embodiment provides a privacy protection method based on a false location in location services, the process of which is as follows figure 1 As shown, it specifically includes the following steps:

[0029] Step 1. When the client needs a certain location service, the user sets an appropriate anonymity K according to his own privacy requirements, and performs step 2;

[0030] Step 2. The client first uses a positioning device such as GPS to obtain its own accurate location L real , and then determine the historical query probability p of the user's current location according to the historical query probability of each location unit obtained from the LBS server and the entry set P of the corresponding coordinates L ; Next, the client selects the set P with the probability value p L The unequal probability values ​​are combined in the probability set , set P and probability value p L Equal probability values ​​are pooled in the set S, using Indicates the...

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Abstract

The invention provides a privacy protection method based on a false location in a location service, and belongs to the technical field of information security. The present invention is based on the DLS algorithm, uses entropy to measure the degree of anonymization, and comprehensively considers the balance between the calculation complexity of the user end and the user's privacy requirements. Since the side information that may be used by the attacker is considered when selecting the false location, the present invention can effectively realize K anonymity, enable the user to obtain a sufficiently large entropy value, and reduce the probability of the user's real location being exposed; and the present invention is aimed at different Different users of the location have made different ways to select the false location, so in any case the false location selected by the user using the present invention can well protect the privacy of the user's location.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a privacy protection method based on a false location in a location service. Background technique [0002] With the rapid development of mobile devices and social networks, location-based services (LBS, Location-Based Service) are more and more widely used. When a mobile user needs to use a certain location service, the mobile user first uses a positioning device (such as a smart phone with built-in GPS) to obtain its own location information, and then sends a query request (which may include the user's identity, hobbies, and location information) to The LBS server processes the service request information through the LBS server, and finally obtains the information it is interested in from the LBS server. When users enjoy the convenience and entertainment brought by location-based services and positioning technology, they also bear the risk of sensitive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/029H04W12/02
CPCH04W4/02H04W12/02
Inventor 廖丹黄勋辉李乐民孙罡李慧
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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