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As the ubiquitous computing environment gets more attention and development,  WSN (Wireless Sensor Network) is getting popular as well. Especially, the  development of wireless communication and sensor equipment greatly  contributes to the popularization of WSN. On the other hand, the safety and  security of WSN attracts lots of attention due to such a development and  distribution. The DoS (Denial of Service) attack, which gets more  sophisticated and broadens its domain into various services fields, may have  negative effects on WSN, making it vulnerable to attacks. Since WSN collects  information through sensors that are already deployed, it is difficult to  have its energy recharged. When WSN is under a DoS attack, sensor nodes  consume lots of energy, bringing about a fatal result to the sensor network.  In this paper, we propose a method to efficiently defend against DoS attacks  by modifying routing protocols in the WSN. This method uses a location based  routing protocol that is simple and easy to implement. In the WSN environment  where the location-based routing protocol is implemented, this method  disperses the DoS attack concentration of traffic by using the traffic  deflection technique and blocks it out before arriving at the target  destinations. To find out the number of traffic redirection nodes proper for  this method, we have performed a few experiments, through which the number of  such nodes was optimized.

Traffic deflection method for dos attack defense using a location-based routing protocol in the sensor network