Biblio

Mobile Ad-hoc Networks (MANETs) are formed when a group of mobile nodes, communicate through wireless links in the absence of central administration. These features make them more vulnerable to several attacks like identity spoofing which leads to identity disclosure. Providing anonymity and privacy for identity are critical issues, especially when the size of such networks scales up. to avoid the centralization problem for key distribution in MANETs. This paper proposes a key distribution scheme for clustered ad-hoc networks. The network is divided into groups of clusters, and each cluster head is responsible for distributing periodically updated security keys among cluster members, for protecting privacy through encryption. Also, an authentication scheme is proposed to ensure the confidentiality of new members to the cluster. The simulation study proves the effectiveness of the proposed scheme in terms of availability and overhead. It scales well for high dense networks and gives less packet drop rate compared to its centralized counterpart in the presence of malicious nodes.

Mobile Ad-hoc NETwork (MANET) is a collection of mobile devices which interchange information without the use of predefined infrastructures or central administration. It is employed in many domains such as military and commercial sectors, data and sensors networks, low level applications, etc. The important constraints in this network are the limitation of bandwidth, processing capabilities and battery life. The choice of an effective routing protocol is primordial. From many routing protocols developed for MANET, OLSR protocol is a widely-used proactive routing protocol which diffuses topological information periodically. Thus, every node has a global vision of the entire network. The protocol assumes, like the other protocols, that the nodes cooperate in a trusted environment. So, all control messages are transmitted (HELLO messages) to all 1-hop neighbor nodes or broadcasted (TC and MID messages) to the entire network in clear. However, a node, which listens to OLSR control messages, can exploit this property to lead an attack. In this paper, we investigate on MultiPoint Relay (MPR) attack considered like one of the efficient OLSR attacks by using a simulation in progressive size gridMANET.