Delay Attack-Resilient Clock Synchronization for Wireless Sensor Networks

Eui-Jik KIM  Jeongsik IN  Sungkwan YOUM  Chul-Hee KANG  

IEICE TRANSACTIONS on Information and Systems   Vol.E95-D   No.1   pp.188-191
Publication Date: 2012/01/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E95.D.188
Print ISSN: 0916-8532
Type of Manuscript: Special Section LETTER (Special Section on Trust, Security and Privacy in Computing and Communication Systems)
Category: Privacy
time synchronization,  security,  delay attack,  wireless sensor networks,  

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This paper presents the design and performance evaluation of a delay attack-resilient clock synchronization scheme (abbreviated to DARCS) for wireless sensor networks. In order to provide both synchronization accuracy and robustness, we propose a novel three-way handshake-based protocol, which completely excludes non-deterministic factors such as random backoff durations and unexpected hardware interrupts in a software manner and, in this way, the node can accurately estimate the relative clock offset and the end-to-end delay between a pair of nodes. Consequently, DARCS makes it possible to correct time synchronization errors as well as to detect delay attacks precisely. The simulation results show that DARCS achieves a higher synchronization accuracy and is more resilient to delay attacks than the other popular time synchronization schemes.