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ADHOC
2007

Attack-resilient time synchronization for wireless sensor networks

9 years 3 months ago
Attack-resilient time synchronization for wireless sensor networks
The existing time synchronization schemes in sensor networks were not designed with security in mind, thus leaving them vulnerable to security attacks. In this paper, we first identify various attacks that are effective to several representative time synchronization schemes, and then focus on a specific type of attack called delay attack, which cannot be addressed by cryptographic techniques. Next we propose two approaches to detect and accommodate the delay attack. Our first approach uses the generalized extreme studentized deviate (GESD) algorithm to detect multiple outliers introduced by the compromised nodes; our second approach uses a threshold derived using a time transformation technique to filter out the outliers. Finally we show the effectiveness of these two schemes through extensive simulations. Ó 2006 Elsevier B.V. All rights reserved.
Hui Song, Sencun Zhu, Guohong Cao
Added 08 Dec 2010
Updated 08 Dec 2010
Type Journal
Year 2007
Where ADHOC
Authors Hui Song, Sencun Zhu, Guohong Cao
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