Recognition and Removal of Black Hole Attack for Secure Communication in MANETs

Wireless networks are gaining popularity to its peak today, as the users want wireless connectivity irrespective of their geographic position. There is an increasing threat of attacks on the Mobile Ad-hoc Networks (MANETs). Black hole attack is one of the security threat in which the traffic is redirected to such a node that actually does not exist in the network. It’s an analogy to the black hole in the universe in which things disappear. The node presents itself in such a way to the node that it can attack other nodes and networks knowing that it has the shortest path. MANETs must have a secure way for transmission and communication which is quite challenging and vital issue. In order to provide secure communication and transmission, researcher worked specifically on the security issues in MANETs, and many secure routing protocols and security measures within the networks were proposed. Previously the works done on security issues in MANETs were based on reactive routing protocol like Ad-Hoc On-demand Distance Vector (AODV) and Dynamic Source Routing (DSR). Different kinds of attacks were studied, and their effects were elaborated by stating how these attacks disrupt the performance of MANETs. The scope of this paper is to develop a technique to identify Black Hole Attack and then removal of Black Hole Attack in Mobile Ad-hoc Networks (MANETs). Simulation is done with Network Simulator (NS2).