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Mathematical Problems in Engineering
Volume 2015, Article ID 538482, 8 pages
http://dx.doi.org/10.1155/2015/538482
Research Article

An Efficient Top- Query Processing with Result Integrity Verification in Two-Tiered Wireless Sensor Networks

1College of Computer Science & Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2College of Mathematics and Computer Science, Anhui Normal University, Wuhu 241003, China
3Tongda College of Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received 9 April 2015; Revised 13 July 2015; Accepted 27 July 2015

Academic Editor: Mark Leeson

Copyright © 2015 Ruiliang He 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.

Abstract

In two-tiered wireless sensor networks, storage nodes take charge of both storing the sensing data items and processing the query request issued by the base station. Due to their important role, storage nodes are more attractive to adversaries in a hostile environment. Once a storage node is compromised, attackers may falsify or abandon the data when answering the query issued by the base station, which will make the base station get incorrect or incomplete result. This paper proposes an efficient top- query processing scheme with result integrity verification named as ETQ-RIV in two-tiered sensor networks. According to the basic idea that sensor nodes submit some encoded message containing the sequence relationship as proof information for verification along with their collected sensing data items, a data binding and collecting protocol and a verifiable query response protocol are proposed and described in detail. Detailed quantitative analysis and evaluation experiments show that ETQ-RIV performs better than the existing work in both communication cost and query result redundancy rate.