Preventing black hole attacks in MANETs using secure knowledge algorithm

Mobile ad hoc networks (MANETs) are a collection of mobile hosts which communicate with each other with no central network authority or fixed infrastructure. Due to its characteristics like mobility and heterogeneity ad hoc networks are more vulnerable to attacks. Black hole is an attack where all the packets forwarded to attacker node, by neighboring nodes, are dropped intentionally. In this paper, we propose a secure knowledge algorithm which aims to detect and prevent the black hole by considering the packet drop reasons in promiscuous mode. Existing AODV routing protocol is modified to detect and prevent the black hole attack The experiment results show that our proposed algorithm secure the AODV against black hole attack in MANETs.