The MANET (Mobile Adhoc Network) is a wireless distributed network. It is formed by group of autonomous mobile nodes without any infrastructure like access points. Every node of MANET can acts as router as well as host. It has a basic characteristic of dynamic topology, it means nodes can enter and leave network any time. MANET is vulnerable to many security attacks. Black hole attack is most occurred attack in MANET and very hard to detect which is performed on network layer. Black hole attacks are classified into two types. In single black hole attack, one malicious node will change the route of source to destination and wrong path of malicious node will follow. In collaborative black hole attack one malicious node records packet at one end and send to another malicious node at other end. Black hole attacks are active attacks. In this paper, we propose a solution for detecting black hole attack. Our protocol's name is EBAODV (Enhance Black hole AODV). In this approach, leader nodes are used for detecting black hole nodes.

Abstract