Cross-layer Trust based Distributed Attack Detection and Response System for MANET

Abstract

In existing works on attack detection in mobile ad hoc network (MANET), mostly Black hole and Gray hole attacks are detected.  Moreover they did not consider the attacks launched at the other layers. Also there are chances of false positives since there is no cross verification of suspected nodes. In this paper, we propose to design a Cross-layer Trust based Distributed Attack Detection (CTDAD) system for MANET. In this system, a distributed attack detection technique is adopted in which each node maintains its own view of the trust value of other nodes. Each node in the network monitors its neighbours with monitoring probability using Least Degree (LDK) algorithm. Each node stores the individualized trust value metrics for their neighbours depending on their direct and indirect interaction, based on the control traffic matrix (CTM) and data traffic matrix (DTM). The nodes with the higher trust value are selected as verifier nodes. For the suspected nodes, the verifier node broadcast status packets to confirm the attack. By checking their response, the attacks are confirmed and then attack defence is initiated towards those attackers. Simulation results have shown that CTDTA technique attains reduced packet drops and overhead with improved packet delivery ratio, compared to LDK-IDS technique.