Author(s): Miss. Sunita Rani; Jaya

Security is an essential feature in wireless networks. Wireless sensor network is a dynamic network with large number of mobile nodes. As the traffic increases over the WSN, it will lead to a number of problems like network congestion and packet loss. This congestion and packet loss occurs due to the attack in WSN. One of the profound attacks is black hole attack. As a result some packets are lost over the network which eventually slows down the communication process. With the help of a rigorous literature review we tend to suggest the solution against black hole attack which is based on fuzzy rule. BFO-fuzzy rule based solution identifies the infected node as well as it provides the solution to reduce data loss over network. We also provide a detailed performance evaluation based on various network parameters. The proposed scheme can be used to identify 99% black hole nodes with almost negligible false.