Date Added: Dec 2010
Wireless Sensor Networks (WSN) is usually made by cooperation of number of limited sensor devices which are connected over the wireless media. There are a lot of its application in military, health and industry. Due to limitations of sensor devices, the networks exposed to various kinds of attacks and conventional defenses against these attacks are not suitable due to the resource constrained nature of these kinds of networks. Therefore, security in WSNs is a challenging task due to inheritance limitations of sensors and it becomes a good topic for researchers. In this paper the authors focus at secure routing protocols in wireless sensor networks and surveyed nineteen papers which focusing on this matter.