10-10-2014, 11:10 AM
A Modified AODV against single and collaborative Black Hole
attacks in MANETs
A Modified AODV.pdf (Size: 660.54 KB / Downloads: 20)
Abstract—
MANETs are best suited for emergency situations
as they facilitate fully distributed, self maintainable dynamic
topology networks that operate without the use of external
infrastructure. But the proliferation of such MANET based
applications is limited as its features though impart high
applicability but also manifest unreliability. Another cause of
unreliability is the mutual intrinsic trust during communication.
One such attack exploiting this trustworthiness is called the
Black Hole attack wherein the Black Hole in the network
promises routing of the data packet to the destination while
in actuality it drops them hence decreasing reliability.
In this paper we therefore analyse MANETs under single
and collaborative Black Hole attack and prevent it by diverting
traffic from the Black Hole. The MANETs so discussed employ
the AODV routing protocol and the method so proposed is
based on sending confirmation packets that are verified by the
destination to check for Black Hole presence in the GAODV
routing protocol so proposed. The GAODV algorithm was then
simulated in both static as well as mobile node environment
and it was observed that its data delivery ratio is significantly
better than the conventional AODV.
Index Terms— Black Hole, Collaborative Black Hole, AODV,
MANETs, security, routing.
INTRODUCTION
A MANET is a self-configuring, distributed, dynamic
network in which the nodes are mobile and communication
is not via fixed access points. Since they act as open
medium any node in space can be a part. Manets have a
huge applicability potential as they have the potential to be
anywhere anytime.[1]
RELATED WORK
A number of solutions to handle the black hole attack have
been proposed in [3].In [4] Deng et al. proposed a method
based on verifying the existence of a path from the next hop
node (to the rrep sending node).The method was suitable for
single black hole detection only
CONCLUSION AND FUTURE WORK
In this paper, with the control packets called CONFIRM,
CHCKCNFRM and REPLYCONFIRM, we have been able
to detect the presence of Black Hole and hence successfully