Biblio

Mobile nodes in a mobile ad hoc network (MANET) form a temporal link between a sender and receiver due to their continuous movement in a limited area. This network can be easily attacked because there is no organized identity. This article discusses the MANET, its various associated challenges, and selected solutions. As a case study, a neighbor trust-based security scheme that can prevent malicious attacks in a MANET is discussed in detail. The security scheme identifies each node's behavior in the network in terms of packets received and forwarded. Nodes are placed in a suspicious range, and if the security scheme detects malicious function continuously, then it is confirmed that the particular node is the attacker in the network.

Mobile ad hoc networks (MANETs) are self-configuring, dynamic networks in which nodes are free to move. These nodes are susceptible to various malicious attacks. In this paper, we propose a distributed trust-based security scheme to prevent multiple attacks such as Probe, Denial-of-Service (DoS), Vampire, User-to-Root (U2R) occurring simultaneously. We report above 95% accuracy in data transmission and reception by applying the proposed scheme. The simulation has been carried out using network simulator ns-2 in a AODV routing protocol environment. To the best of the authors' knowledge, this is the first work reporting a distributed trust-based prevention scheme for preventing multiple attacks. We also check the scalability of the technique using variable node densities in the network.