International Journal of Emerging Science and Engineering (IJESE)
In wireless sensor network, due to the high density of nodes, the redundant data will be detected by neighboring nodes while sensing an event. So energy consumption is key issue in wireless sensor network. In order to save energy all these redundant data will be aggregated at intermediate node and then it will send to sink node. Wireless sensor network has some key constraints such as limited energy resources, lack of infrastructure. All these constraints impose some security challenges. Now-a-days, wireless sensor network widely used in many civilian application areas which include environment and healthcare applications, home automation, habitat monitoring and traffic control.