A combined technique for attack monitoring and risk assessment in MANET routing

Mobile Adhoc Network (MANET) is extremely susceptible to more attacks owing to its characteristics such as mobility and dynamic topology changes. In particular, routing process in MANET is aimed by more adversaries for various attacks to ruin the data transmission. In this paper, we introduce a combined technique for attack monitoring and risk assessment in MANET routing. The proposed solution chooses some nodes as monitoring nodes using Gittins index. The monitoring nodes are responsible for observing and discovering risks among nodes. Once risk in a node is detected considering reliability and reputation values, a warning message is forwarded to the node to invoke the risk assessment process. Efficiency of the proposed technique is proved through simulation results. It shows the combined technique increases packet delivery ratio and it achieves the risk assessment process with low computation cost and overhead.