Avoidance of Black hole affected routes in AODV-based MANET

Mobile ad hoc networks (MANETs) are established frequently when needed as of their improved nature. Wireless medium is accessible to malicious and legitimate users which makes the network much vulnerable to different internal and external attacks. Routing protocols for MANET are responsible for mobility of wireless networks and these are the common target of these threats. Ad hoc On-demand Distance Vector (AODV) is commonly employed and an efficient routing protocol. Black hole attack is a common active and internal attack which can misdirects the routing in reactive protocols. In this paper, a solution is proposed to avoid Black hole attack in AODV. Proposed solution uses a route legitimacy value attached with RREP which ensures that the route is free from black hole node.