My thesis was on " Secure Data Relaying via Vehicles for Wireless Sensor Networks " in the FULTON School of Engineering, Computer Science Department, Arizona State University , Tempe, AZ under Dr. Hasan Cam (May 28, 2004). Conference Papers : 1] Energy Efficient Security Protocol for Wireless Sensor Networks - IEEE VTC Fall 2003 Conference, October 4-9, Orlando, 2003 2] ESPDA: Energy Efficient Secured protocol for Data Aggregation in Wireless Sensor Networks - IEEE Sensors - The Second IEEE Conference on Sensors, Oct. 22-24, 2003, Toronto, Canada 3] Wireless Sensor Network Security - REAS Symposium 2003 at Arizona State University, Tempe. Journal Papers : 1] Energy Efficient Secured protocol for Data Aggregation in Wireless Sensor Networks -- appeared in IEEE Computer Communications on Sensor Networks, December 2004. 2] SDDA: Secure Differential Data Aggregation in wireless sensor networks -- appeared in IEEE Sensor Network Operations Monograph, Septemb