A Mechanism for Detection and Prevention of multiple Gray Hole Attack in Wireless Sensor Networks

Computer Engineering

In the current decade, wireless sensor networks are emerging as a peculiar multi-disciplinary research area. Wireless Sensor Networks (WSNs) are appealing to researchers due to their wide range of application potential in areas such as military purposes, environmental monitoring and gathering information in inhospitable locations. Wireless Sensor Networks are dense wireless networks of small, low-cost sensors, which collect and disseminate environmental data. Sensor networks vary in size and can consist of 10 to 1,000,000 sensor nodes. Sensor nodes used to form these networks are resource-constrained, which makes these types of security applications a challenging problem. A basic technique to protect data is encryption; but, due to resource constraints, achieving necessary key agreement for encryption is not easy. Watchdog mechanism proposed in is a monitoring method used for wireless sensor networks, and is the basis of many misbehaviour detection algorithms and trust or reputation systems. In this paper, the behavior of multiple gray hole attacks and the performance impact of this attack on AODV protocol and its counter measures using Watchdog AODV scheme is studied. The NS2 network simulator is used for evaluation.

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