Query l-diversity in Location-Based Services

Most existing cloaking techniques only focus on achieving location k-anonymity. However; maintaining location k-anonymity alone is not enough to counter query homogeneity attacks. In this paper, we first define the query l-diversity concept in location-based services, and then propose a technique to achieve query l-diversity. The proposed technique is compared with the improved Interval Cloak technique using simulation; and the extensive results indicate that our technique is better in protecting user privacy.