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Security and Communication Networks
Volume 2017, Article ID 7495974, 15 pages
Research Article

An Improved Privacy-Preserving Framework for Location-Based Services Based on Double Cloaking Regions with Supplementary Information Constraints

1School of Software, Central South University, Changsha 410075, China
2School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China

Correspondence should be addressed to Mengyao Zhu; nc.ude.uhs@oaygnemuhz

Received 18 August 2017; Accepted 10 October 2017; Published 7 November 2017

Academic Editor: Lianyong Qi

Copyright © 2017 Li Kuang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


With the rapid development of location-based services in the field of mobile network applications, users enjoy the convenience of location-based services on one side, while being exposed to the risk of disclosure of privacy on the other side. Attacker will make a fierce attack based on the probability of inquiry, map data, point of interest (POI), and other supplementary information. The existing location privacy protection techniques seldom consider the supplementary information held by attackers and usually only generate single cloaking region according to the protected location point, and the query efficiency is relatively low. In this paper, we improve the existing LBSs system framework, in which we generate double cloaking regions by constraining the supplementary information, and then k-anonymous task is achieved by the cooperation of the double cloaking regions; specifically speaking, k dummy points of fixed dummy positions in the double cloaking regions are generated and the LBSs query is then performed. Finally, the effectiveness of the proposed method is verified by the experiments on real datasets.