Abstract
Mobile Adhoc Networks (MANETs) are dynamic in nature. Any nodes can join and leave the network at any time. Hence any type of intruders can attack the communication at any time, especially the routing mechanism between the nodes. In this study, we study and understand two types of attacks which cause more damage to the routing performance of MANET; the attacks are Black Hole attacks and Gray Hole attacks and compare the impact of these attacks on MANET. "Send Fake Route Reply to the nodes" type of attack is used to understand the behavior of these two types of attacks. Existing AODV protocol is modified in order to study these types of attacks in MANET. Performance evaluation of the proposed method is carried out using NS-2. In the presence of these attacks the network performance degrades for various network attributes. The performance of MANET under attack is thoroughly investigated, by applying it on various network parameters with various node densities. Not only had that which attack causes more damage to the environment also studied.
Highlights
Mobile adhoc networks are self deployable i.e., each node in Mobile Adhoc Networks (MANETs) acts as a router and allows other users to communicate through their mobile devices
We present the results of the analysis in which we exclusively compare the impact of Black Hole attack with Gray Hole attack on Adhoc On demand Distance Vector (AODV) with different network size
In this study we have studied and analyzed the performance of two types of attacks known as Black Hole and Gray Hole attacks
Summary
Mobile adhoc networks are self deployable i.e., each node in MANET acts as a router and allows other users to communicate through their mobile devices. Any user can communicate with other user within a particular range. The nodes move arbitrarily, node topology of these network changes frequently which causes frequent disconnection in their communication. Unlike the cellular networks which rely on infrastructure, MANETs does not require any expensive base station. These MANETs can be used in situations such as tsunami, earthquake and military communications and so on. Mobile adhoc networks support portability and mobility but are vulnerable to various types of security attacks Fig. 1. Security is an important issue for these applications
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