... and challenges in wireless sensor networks. We identify the security threats, review proposed security mechanisms for wireless sensor networks. Keywords: Wireless Sensor Networks (WSNs), ... of Technology, Patna, Bihar, India, 3 Electronics and Com. Engg. Dept, Birsa Institute of Technology, Sindri, Dhanbad –8 28123, Jharkhand, India, Abstract: The severe constraints and demanding ... Routing in Wireless Sensor Networks , International Journal of Advanced Networking and Application (IJANA), Sept.–Oct. 2010, vol. 02, issue 02, pp. 57 0–5 80. 3. Shio Kumar Singh, M.P. Singh, and...