Title

Protecting User Privacy Better With Query L-Diversity

Keywords

Cloaking; Location k-anonymity; Location-based services; Privacy protection; Query processing

Abstract

This paper examines major privacy concerns in location-based services. Most user privacy techniques are based on cloaking, which achieves location k-anonymity. The key is to reduce location resolution by ensuring that each cloaking area reported to a service provider contains at least k mobile users. However, maintaining location k-anonymity alone is inadequate when the majority of the k mobile users are interested in the same query subject. In this paper, the authors address this problem by defining a novel concept called query l-diversity, which requires diversified queries submitted from the k users. The authors propose two techniques: Expand Cloak and Hilbert Cloak to achieve query l-diversity. To show the effectiveness of the proposed techniques, they compare the improved Interval Cloak technique through extensive simulation studies. The results show that these techniques better protect user privacy. Copyright © 2010. IGI Global.

Publication Date

1-1-2010

Publication Title

International Journal of Information Security and Privacy

Volume

4

Issue

2

Number of Pages

1-18

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.4018/jisp.2010040101

Socpus ID

79957519799 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79957519799

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