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An ad-hoc network is a multi-hop wireless network where all nodes cooperatively maintain network connectivity without a centralized infrastructure. If these nodes change their positions dynamically, it is called a mobile ad-hoc network (MANET). Since the network topology changes frequently, efficient adaptive routing protocols such as AODV, DSR, and NTP are used. As the network is wireless, security...
In mobile ad hoc networks the nodes are dynamically changing and they have a fully decentralized topology. Hence, security is hard to achieve due to the dynamic nature of the relationships between the participating nodes as well as the vulnerabilities and limitations of the wireless transmissions medium. We proposed a novel agent based framework to monitor, detect, and isolate misbehaving nodes in...
Different attacks on routing protocols in ad hoc networks occur that one of the most dangerous types is called wormhole attack. This attack happens with the assistance of at least two or more malicious nodes. In this attack nodes create a private tunnel which if a packet comes to one of them, it will be guided to other pair of these malicious nodes by this tunnel and that node broadcasts it into network...
MANET brings evolution in wireless mobile ad hoc network but it has to face many difficulties due to the dynamic network topologies, lack of centralization, inadequate authentication mechanism, insecure routing and are vulnerable to different types of attacks. Different types of denial of service attacks occur in MANET which is one of the major problems. We used AODV routing because it offers quick...
Mobile adhoc network (MANET) has become an exciting and important technology in recent years because of the rapid proliferation of wireless devices. MANET's are highly vulnerable to attacks due to the open medium, dynamically changing network topology, cooperative algorithms, lack of centralized monitoring and management point, and lack of clear line defense. In this work we analyze the blackhole...
IP traceback in MANET (mobile ad-hoc network) is more difficult than in traditional wired network because of the dynamically-changing topologies and limitation in resource. Researches in IP traceback for MANET largely follow the similar approaches as in the wired network and are having difficulties in overcoming the above mentioned topology and resource limitation problem. We suggest to cope with...
In this paper we revisit some considerations relative to the performance of re-clustering algorithms in MANET. We recommend that for a secure MANET the design of re-clustering algorithms should not only provide for clustering stability, but also for network robustness in terms of network connectivity, of message reliability, of tolerance against the attacks that target the cluster head nodes and of...
Engineers have proposed lots of mechanisms for providing secure communications in ad hoc networks since the early 1990s. Due to the absence of fixed infrastructure, ad hoc networks are more vulnerable when encountering security threats than conventional wireless networks. The mobile ad hoc network can be considered as a short-lived collection of mobile nodes that communicate with each other. All involved...
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