Affiliation:
1. Hong Kong Baptist University, Kowloon Tong, Hong Kong
Abstract
State-of-the-art location-based services (LBSs) involve data owners, requesting clients, and service providers. As LBSs become new business opportunities, there is an increasing necessity to verify the genuineness of service results. Unfortunately, while traditional query authentication techniques can address this issue, they fail to protect the confidentiality of data, which is sensitive location information when LBSs are concerned. Recent work has studied how to preserve such location privacy in query authentication. However, the prior work is limited to range queries, where private values only appear on one side of the range comparison. In this paper, we address the more challenging authentication problem on top-k queries, where private values appear on both sides of a comparison. To start with, we propose two novel cryptographic building blocks, followed by a comprehensive design of authentication schemes for top-k queries based on
R
-tree and
Power Diagram
indexes. Optimizations, security analysis, and experimental results consistently show the effectiveness and robustness of the proposed schemes under various system settings and query workloads.
Subject
General Earth and Planetary Sciences,Water Science and Technology,Geography, Planning and Development
Cited by
38 articles.
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