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The Scientific World Journal
Volume 2014, Article ID 751845, 7 pages
Research Article

Privacy-Preserving Location-Based Query Using Location Indexes and Parallel Searching in Distributed Networks

School of Computer and Electronics and Information, Guangxi University, Nanning, Guangxi 530004, China

Received 5 January 2014; Accepted 26 February 2014; Published 25 March 2014

Academic Editors: T. Cao, M. Ivanovic, and F. Yu

Copyright © 2014 Cheng Zhong 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.


An efficient location-based query algorithm of protecting the privacy of the user in the distributed networks is given. This algorithm utilizes the location indexes of the users and multiple parallel threads to search and select quickly all the candidate anonymous sets with more users and their location information with more uniform distribution to accelerate the execution of the temporal-spatial anonymous operations, and it allows the users to configure their custom-made privacy-preserving location query requests. The simulated experiment results show that the proposed algorithm can offer simultaneously the location query services for more users and improve the performance of the anonymous server and satisfy the anonymous location requests of the users.