N.Thangamani , S.John Grasias , Dr.G.Dalin. 2017. “Ucon-Ipso: Usage Control With Improved Particle Swarm Optimization (Ipso) Based Hierarchical Security Framework for Attack Detection in Wireless Sensor Networks ”. International Journal of Emerging Trends in Science and Technology 4 (08), 5681-91. https://ijetst.igmpublication.org/index.php/ijetst/article/view/1322.