Abstract:
A mobile ad hoc network (MANET) is a nonorganized structure, decentralized monitoring and
dynamic changing network topology of mobile devices
connected by wireless for transmission of data from
source to destination. In MANET, security of routing
protocol is a basic requirement to provide protected
communication between mobile nodes. The
vulnerability of MANET creates a number of challenges
on securing this routing protocol. In order to overcome
these challenges, it is essential to improve the routing
technique and achieve secure data communication as
well as desirable network performance. MANETs are
susceptible to various attacks. Among these black hole
attack is one of the common ones, which affects ad hoc
on demand distance vector (AODV) routing protocol.
In this paper, a new modified AODV protocol is
proposed to identify single as well as multiple black hole
nodes in networks. Our technique identifies the black
hole node based on computing each received route
reply(RREPs) from intermediate node which is
monitored at the source node. The simulation of the
proposed algorithm demonstrates that the solution
detects black hole node and allow source node to avoid
it and also improves the overall performance of AODV
in the presence of black hole attack.
