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Sensors 2009, 9(6), 4709-4727; doi:10.3390/s90604709

Secure Cluster Head Sensor Elections Using Signal Strength Estimation and Ordered Transmissions

1
Department of Computing and Networking Resources, 335 Gwahangno, Yuseong-gu, KISTI / Daejeon, 305-806, Korea
2
CAIIT, Div. of Electronics and Information Engineering, Chonbuk Univ. / Jeonju, 561-756, Korea
*
Author to whom correspondence should be addressed.
Received: 1 April 2009 / Revised: 20 May 2009 / Accepted: 3 June 2009 / Published: 16 June 2009
(This article belongs to the Special Issue Wireless Sensor Technologies and Applications)
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Abstract

In clustered sensor networks, electing CHs (Cluster Heads) in a secure manner is very important because they collect data from sensors and send the aggregated data to the sink. If a compromised node is elected as a CH, it can illegally acquire data from all the members and even send forged data to the sink. Nevertheless, most of the existing CH election schemes have not treated the problem of the secure CH election. Recently, random value based protocols have been proposed to resolve the secure CH election problem. However, these schemes cannot prevent an attacker from suppressing its contribution for the change of CH election result and from selectively forwarding its contribution for the disagreement of CH election result. In this paper, we propose a modified random value scheme to prevent these disturbances. Our scheme dynamically adjusts the forwarding order of contributions and discards a received contribution when its signal strength is lower than the specified level to prevent these malicious actions. The simulation results have shown that our scheme effectively prevents attackers from changing and splitting an agreement of CH election result. Also, they have shown that our scheme is relatively energy-efficient than other schemes.
Keywords: secure cluster head election; sensor networks; signal strength estimation; ordered transmissions secure cluster head election; sensor networks; signal strength estimation; ordered transmissions
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wang, G.; Cho, G. Secure Cluster Head Sensor Elections Using Signal Strength Estimation and Ordered Transmissions. Sensors 2009, 9, 4709-4727.

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