Dynamically adjustable k-anonymity position privacy protection method in VANET (Vehicular Ad hoc Network)

A privacy protection and privacy technology, applied in the field of information security, can solve the problems of not taking into account the user's location privacy preference, context scene changes, location privacy protection degree is not high, to improve the location privacy protection level, improve query efficiency, and increase the area Effect

Active Publication Date: 2017-07-28
HUNAN UNIV
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Problems solved by technology

[0005] The present invention provides a dynamically adjustable k-anonymous location privacy protection method in VANET. The three

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  • Dynamically adjustable k-anonymity position privacy protection method in VANET (Vehicular Ad hoc Network)
  • Dynamically adjustable k-anonymity position privacy protection method in VANET (Vehicular Ad hoc Network)
  • Dynamically adjustable k-anonymity position privacy protection method in VANET (Vehicular Ad hoc Network)

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Such as figure 1 with figure 2 As shown, a dynamically adjustable k-anonymous location privacy protection method in VANET includes the following steps:

[0041] Step 1: Service request;

[0042] Build a user location privacy preference prediction model to obtain the user's privacy protection strength k value in different contexts; perform location anonymization on the user's real location and query radius based on the privacy protection strength k value, and send the anonymous result query service to the nearest Roadside unit RSU;

[0043] The construction process of the user location privacy preference prediction model is as follows:

[0044] (1) Establish the user's context k-anonymity matrix R;

[0045] Each element in the user's context k-anonymity matrix R represents the privacy protection strength k of a certain user u in a certain co...

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Abstract

The invention discloses a dynamically adjustable k-anonymity position privacy protection method in a VANET (Vehicular Ad hoc Network). Position privacy preferences of users are discovered by mining history behavior data of the users; a position privacy preference model is established and is used for predicting the position privacy preferences of the target users in different contexts; different demands of the users for the quality of service are satisfied by dynamically adjusting position privacy protection degree k values; and through analysis of specific features of the VANET, user vehicles can obtain neighbor vehicle position information through broadcast messages and a trusted third party in a traditional LSB system structure is removed, so the communication cost is reduced, the search efficiency is improved, and a single-point attack is avoided. A cloaked vehicle set satisfying k-anonymity is obtained according to whether the distribution of the neighbor vehicle positions obtained by the user vehicles through the broadcast messages is dispersed or not, an area of a cloaked region CR is improved, and a position privacy protection level is improved.

Description

technical field [0001] The invention belongs to the field of information security, in particular to a dynamically adjustable k-anonymous position privacy protection method in VANET. Background technique [0002] The present invention is a vehicle ad hoc network (Vehicular Ad hoc Network, VANET) oriented to urban areas, which is an ad hoc network composed of vehicles, roadside units (Road Side Unit, RSU) and service providers (such as gas stations, restaurants, etc.) network. RSU acts as a service registration center, the service provider registers with RSU, and the vehicle that sends a service request to RSU serves as a service requester. As a communication gateway, the roadside unit RSU communicates with vehicles through DSRC (Dedicated Short Range Communication) technology, and communicates with service providers through the Internet network. The vehicle node is equipped with central processing unit, memory, wireless communication module, GPS locator, sensor and other de...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
CPCH04L63/0421H04L67/52
Inventor 罗娟钟涛张振燕胡瑾瑜
Owner HUNAN UNIV
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