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Journal of Information Science and Engineering, Vol. 27 No. 2, pp. 657-680


An Anonymous Path Routing (APR) Protocol for Wireless Sensor Networks

JEHN-RUEY JIANG1, JANG-PING SHEU1,2, CHING TU1 AND JIH-WEI WU1,3
1Department of Computer Science and Information Engineering 
National Central University 
Chungli, 320 Taiwan 
2Department of Computer Science 
National Tsing Hua University 
Hsinchu, 300 Taiwan 
3Department of Informational Management 
Lan-Yang Institute of Technology 
Ilan, 261 Taiwan

    How to secure data communication is an important problem in wireless sensor networks (WSNs). General solutions to the problem are to encrypt the packet payload with symmetric keys. But those solutions only prevent the packet content from being snooped or tampered. Adversaries still can learn of network topology by the traffic analysis attack for starting devastating attacks such as the denial-of-service attack and the like. In this paper, we propose an anonymous path routing (APR) protocol for WSNs. In APR, data are encrypted by pair-wise keys and transmitted with anonyms between neighboring sensor nodes and anonyms between the source and destination nodes of a multi-hop communication path. The encryption prevents adversaries from disclosing the data, and the anonymous communication prevents adversaries from observing the relation of the packets for further attacks. We implement APR on the MICAz platform to evaluate its overheads for demonstrating its applicability in practical WSNs.

Keywords: anonymous routing, pair-wise key, symmetric cryptography, wireless sensor networks, network security

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