A user privacy protection method for road network continuous query attacks

A road network and user privacy technology, which is applied in the field of user privacy protection for continuous query attacks on road networks, can solve problems such as high exposure probability and vulnerability to attacks, and achieve the effect of protecting user privacy

Active Publication Date: 2019-05-03
NANJING UNIV OF TECH
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: Aiming at the problem that the existing methods in the background technology are vulnerable to attacks and the real location has a higher exposure probability, the present invention proposes a user privacy pr

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  • A user privacy protection method for road network continuous query attacks
  • A user privacy protection method for road network continuous query attacks
  • A user privacy protection method for road network continuous query attacks

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[0045] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0046] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein explain.

[0047] refer to Figure 7 As shown, the present invention converts the actual map into an abstract weighted directed graph model by analyzing a typical road section expansion algorithm, introduces position entropy as a privacy metric, and quantifies attributes such as the intersection steering prefe...

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Abstract

The invention discloses a user privacy protection method for road network continuous query attacks. The method comprises the following steps: firstly, converting an actual map into an abstract directed weighted graph model, and introducing a position entropy as a privacy measurement standard; secondly, proposing a universal road segment expansion attack algorithm MSARN by combining the constraintcharacteristics of the road network on the action of the user and the maximum moving speed attack idea, and designing a protection algorithm CORE by taking the universal road segment expansion attackalgorithm MSARN as a defense target, so that the probabilities of the user on each road in the anonymous road segment set are as equal as possible; and finally, a moving object is generated on a realmap by using an SUMO tool according to the intelligent driving model in a simulation experiment, the effectiveness of the position entropy measurement is proved, and the superiority of the MSARN compared with a typical attack algorithm and the good resistance of CORE to the MSARN are analyzed. According to the method, the problems that an existing method is easily attacked and a real position hasa high exposure probability are solved, and the user privacy facing the road network is effectively protected.

Description

technical field [0001] The invention relates to a road network-oriented user privacy protection method, and belongs to the technical field of combining location services and privacy protection applications. Background technique [0002] In the general European space scene, the user can move to any point in the space, and its movement mode is only related to the movement speed, direction and time. However, in road network scenarios, users' mobility patterns are also constrained by factors such as road speed limits and traffic bans. If the privacy protection policy applicable to the European space is directly applied to the road network scene, it will lead to serious privacy leakage problems. For example, in a concealed region conforming to the k-anonymity and l-dissimilarity measures, there may be only one road within reach of the current user. Therefore, we need to study the applicable privacy protection strategy according to the mobile characteristics of users in the road...

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Application Information

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IPC IPC(8): G06F21/62
Inventor 沈航白光伟周凌宇王仲晖王天荆陈林牛晓磊
Owner NANJING UNIV OF TECH
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