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Document Type

Journal Article

Department/Unit

Department of Computer Science

Title

Authenticating location-based skyline queries in arbitrary subspaces

Language

English

Abstract

With the ever-increasing use of smartphones and tablet devices, location-based services (LBSs) have experienced explosive growth in the past few years. To scale up services, there has been a rising trend of outsourcing data management to Cloud service providers, which provide query services to clients on behalf of data owners. However, in this data-outsourcing model, the service provider can be untrustworthy or compromised, thereby returning incorrect or incomplete query results to clients, intentionally or not. Therefore, empowering clients to authenticate query results is imperative for outsourced databases. In this paper, we study the authentication problem for location-based arbitrary-subspace skyline queries (LASQs), which represent an important class of LBS applications. We propose a basic Merkle Skyline R-tree method and a novel Partial S4-tree method to authenticate one-shot LASQs. For the authentication of continuous LASQs, we develop a prefetching-based approach that enables clients to compute new LASQ results locally during movement, without frequently contacting the server for query re-evaluation. Experimental results demonstrate the efficiency of our proposed methods and algorithms under various system settings. © 1989-2012 IEEE.

Keywords

Query processing, Spatial databases and GIS

Publication Date

2014

Source Publication Title

IEEE Transactions on Knowledge and Data Engineering

Volume

26

Issue

6

Start Page

1479

End Page

1493

Publisher

Institute of Electrical and Electronics Engineers

ISSN (print)

10414347

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