Impact Analysis of Black Hole, Flooding Attacks and Enhancements in MANET Using SHA-3 Keccak Algorithm

In present-day wireless communication scenario, Mobile ad hoc network (MANET) plays a very important role, as it consists of many autonomous nodes which communicate together to form a proper communication network. Each node in a network will move in random path, so that nodes direction will change frequently. But, some of the nodes may misbehave which leads to many problems in that network. These nodes are called as malicious nodes which create severe data loss by dropping data packets, and network may loss its privacy due to these intruders. So, providing security is the major challenge, because the networks are more vulnerable to many attacks. Some major attacks like flooding and black hole affect the E2E delay, packet delivery ratio (PDR), and throughput of the network. So, this paper mainly explains on enhancements in security in AODV using efficient techniques called SHA-3 Keccak and dynamic threshold routing algorithm.