A Cluster based Technique for Securing Routing Protocol AODV against Black-hole Attack in MANET

Mobile ad-hocnetworks areprone tovarioussecurity vulnerabilitiesbecause of its characteristicsmainlyhigh mobility of nodes,and no well defined architecture.Security measuresare difficult to implement asthere is nocentral administration. Several attackson Mobile ad-hoc networkhavebeen identified so farand Black hole attack is oneof them. In this paper we discussblack hole attackon Ad-hoc network andpropose a solution to the hijacked node behaving as black hole node. A scenario has been consideredwhere anode inside network has been intruded andcompromised tocause blackholeattack. The proposedsecuritysolutionmodifies original AODV using a hierarchical basedintrusion detectionmethod toidentifyhijacked nodeand exclude the particular node from network