WSN> Vol.4 No.2, February 2012

Fuzzy Based Assignment Method of Filtering Nodes in Wireless Sensor Networks

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ABSTRACT

Wireless sensor networks (WSNs) are networked systems that are able to sense various events and report the events to a user to enable appropriate responses. One of security threats to a WSN is false data injection attacks in which an attacker steals some sensor nodes in the network and injects forged event messages into the network through the captured nodes. As a result, the intermediate nodes on the forwarding paths of the false event messages waste their limited energy. Additionally, the network cannot provide the user with correct information. There have been many studies on en-route detection of false event messages for WSNs. Yang et al. proposed the commutative cipher-based en-route filtering scheme (CCEF) which establishes a secure session between a sink node and a cluster head (CH) based on the commutative cipher. In CCEF, each intermediate node on the path between the sink node and the CH receives an event message and verifies the authenticity of the session based on a probability. Due to the probabilistic approach, it is hard to adapt to the change of false traffic ratio in the network and energy inefficiency may occur. We propose a filtering scheme which applies a deterministic approach to assign filtering nodes to a given session. The proposed method consumes less energy than that of CCEF without sacrificing security.

Cite this paper

S. Moon and T. Cho, "Fuzzy Based Assignment Method of Filtering Nodes in Wireless Sensor Networks," Wireless Sensor Network, Vol. 4 No. 2, 2012, pp. 40-44. doi: 10.4236/wsn.2012.42006.

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