Differential privacy protection method and system for track time mode

A technology of time mode and differential privacy, applied in digital data protection, character and pattern recognition, service based on location information, etc., can solve the problem of inability to quantitatively analyze security, k-anonymity protection model cannot provide security, trajectory time mode There is little research on privacy protection and other issues

Active Publication Date: 2020-11-17
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] (3) The k-anonymous protection model cannot provide an effective and strict method to prove its security. When the k value changes, its security cannot be quantitatively analyzed
[0008] Although there have been many research results applying differential privacy to trajectory dat...

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  • Differential privacy protection method and system for track time mode
  • Differential privacy protection method and system for track time mode
  • Differential privacy protection method and system for track time mode

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Embodiment Construction

[0076] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0077] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a differential privacy protection method and system for a track time mode, and belongs to the field of data mining. The method comprises the following steps: firstly, based onan anonymization thought, carrying out coarse-grained disturbance on track time data by using kanonymity, and anonymously hiding data in an original single time period into a whole day; then, using aLaplace mechanism for carrying out fine-grained disturbance on a timestamp of a track; and finally, limiting the noise disturbance error within a fixed range based on a truncation Laplace mechanism,thereby improving the precision of the published data. The problem of individual privacy leakage caused by periodicity of the track time mode is solved.

Description

technical field [0001] The invention belongs to the field of data mining, and relates to a differential privacy protection method and system for trajectory time patterns. Background technique [0002] With the rapid development of GPS and WIFI, a large amount of spatio-temporal data is generated. Trajectories are spatio-temporal data based on time sampling, including attributes such as sampling point locations, sampling time, and sampling speed. Since spatio-temporal trajectory data has periodicity in time patterns, clustering and correlation analysis can obtain a large amount of personal privacy information. For example, by observing the fixed location of the user during the morning rush hour from Monday to Friday, it can be deduced that the location has a high probability of being the user's home address. In recent years, due to the frequent occurrence of privacy leakage events caused by the trajectory time pattern, it has posed a great threat to the user's property secur...

Claims

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Application Information

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IPC IPC(8): G06F21/62G06K9/62H04W4/029
CPCG06F21/6245H04W4/029G06F18/23
Inventor 王豪吴婷婷王昭琨夏英张旭
Owner CHONGQING UNIV OF POSTS & TELECOMM
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