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A sensor network consists of a large number of sensor nodes, which are spread over a geographical area. Sensor networks have found their way into many applications, from military domains to traffic or environmental monitoring, to name a few. As sensor networks reach towards wide spread deployment, security becomes a major concern. We need to be sure about the confidentiality, authenticity and tamper-proof of data. The research thus far has focused on how to deploy sensor networks so that they can work efficiently. The focus of this paper is on sensor networkspsila security issues. We propose a formal model to design and analyze the secure sensor network system. The model is based on an augmented Petri net formalism called extended elementary object system. This proposed secure sensor network model has a multi-layered structure consisting of sink node level, sensor node level and security mechanism level. At the security mechanism level, a synchronous firing mechanism is utilized as a security measure to detect malicious node attacks to sensor data and information flow. In addition, the model applies SNEP protocol for authentication and confidentiality of sensor data.
Date of Conference: 14-16 Aug. 2008