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International Journal of Distributed Sensor Networks
Volume 2011 (2011), Article ID 828414, 19 pages
http://dx.doi.org/10.1155/2011/828414
Research Article

Anonymous Aggregator Election and Data Aggregation in Wireless Sensor Networks

Laboratory of Cryptography and Systems Security (CRYSYS), Budapest University of Technology and Economics, Bme-Hit, P.O. Box 91, 1521 Budapest, Hungary

Received 15 February 2011; Revised 15 May 2011; Accepted 30 June 2011

Copyright © 2011 Tamás Holczer and Levente Buttyán. 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 mission critical cyber-physical systems, dependability is an important requirement at all layers of the system architecture. In this paper, we propose protocols that increase the dependability of wireless sensor networks, which are potentially useful building blocks in cyber-physical systems. More specifically, we propose two private aggregator node election protocols, a private data aggregation protocol, and a corresponding private query protocol for sensor networks that allow for secure in-network data aggregation by making it difficult for an adversary to identify and then physically disable the designated aggregator nodes. Our advanced protocols resist strong adversaries that can physically compromise some nodes.