Spatial aggregation based trajectory data privacy protection method and system

A technology of privacy protection and trajectory data, applied in the field of privacy protection of trajectory data based on spatial aggregation, can solve problems such as difficulty in ensuring overall data distortion, difficulty in coping with large amounts of spatial data, complex operation procedures, etc., and achieve simple calculation complexity , strong migration and portability effects

Active Publication Date: 2015-12-30
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method based on the entire trajectory data consumes a lot of resources and time, and it is difficult to guarantee the overall distortion of the data
At the same time, this protection method based on trajectory fragments has complex operation procedures and high computational complexity, making it difficult to deal with large amounts of spatial data.

Method used

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  • Spatial aggregation based trajectory data privacy protection method and system
  • Spatial aggregation based trajectory data privacy protection method and system
  • Spatial aggregation based trajectory data privacy protection method and system

Examples

Experimental program
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Embodiment

[0077] This method selects Shenzhen as the research area, and uses the mobile phone call data (CDR) of the research area in 2011 as the research data source. see Figure 6 , is the included base station location and the Thiessen multi-deformation schematic diagram generated according to the base station location, and the coordinate location information recorded in Table 1 represents the information of the location information record data of the base station. Adopt the method of the present invention to process data.

[0078] Table 1 Partial call records of mobile phone users whose user anonymous identification is "0000****50"

[0079] Anonymous identification of mobile phone users

The time when events such as making / receiving calls occurred

dimension coordinates

longitude coordinates

event type

area code

0000****50

2011 / 5 / 1 4:39

22.550833

114.125833

0

0755

0000****50

2011 / 5 / 1 5:45

22.542534

114.11719 ...

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Abstract

The invention provides a spatial aggregation based trajectory data privacy protection method and system. According to the method, an individual privacy risk metric value is acquired through establishment of a privacy model, the individual privacy risk metric value and the actual condition of urban population risk spatial distribution are compared, privacy risk protection is established, and an effect after privacy protection is evaluated. The method is simple, low in calculation complexity and applicable to spatial data with large data volume.

Description

technical field [0001] The technical field of data security of the present invention particularly relates to a method and system for privacy protection of track data based on spatial aggregation. Background technique [0002] In the context of big data, it has become possible to identify individuals from call location data (CDR) by mining the spatial data of mobile phone user activities. With its detailed record list and powerful information contained in mobile phone positioning data, it has become a main research direction of various operators and scientific research institutions. At present, the identification of individual occupation and residence through mobile phone data, and the study of urban residents' activity patterns and urban spatial structure through mobile phone data have become a reality and have been scientifically verified. From the released mobile phone positioning data, using related mining algorithms to identify individuals with obvious characteristics i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/62
CPCG06F21/6245G06F2221/2107
Inventor 尹凌王倩汪伟胡金星林楠刘耿
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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