secure cluster head sensor elections using signal strength estimation and ordered transmissions确保选举簇头传感器使用信号强度估计和有序传输.pdf

Sensors 2009, 9, 4709-4727; doi:10.3390/ OPEN ACCESS sensors ISSN 1424-8220 /journal/sensors Article Secure Cluster Head Sensor Elections Using Signal Strength Estimation and Ordered Transmissions Gicheol Wang 1,* and Gihwan Cho 2 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; E-Mail: ghcho@chonbuk.ac.kr * Author to whom correspondence should be addressed; E-Mail: gcwang@kisti.re.kr; Tel.: +82-42-828-5145; Fax: +82-42-869-0509 Received: 1 April 2009; in revised form: 20 May 2009 / Accepted: 3 June 2009 / Published: 16 June 2009 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