Abstract
Security in mobile ad hoc networks (MANETs) is challenging due to the ability of adversaries to gather necessary intelligence to launch insider jamming attacks. The solutions to prevent external attacks on MANET are not applicable for defense against insider jamming attacks. There is a need for a formal framework to characterize the information required by adversaries to launch insider jamming attacks. In this paper, we propose a novel reputation-based coalition game in MANETs to detect and mitigate insider jamming attacks. Since there is no centralized controller in MANETs, the nodes rely heavily on availability of transmission rates and a reputation for each individual node in the coalition to detect the presence of internal jamming node. The nodes will form a stable grand coalition in order to make a strategic security defense decision, maintain the grand coalition based on node reputation, and exclude any malicious node based on reputation value. Simulation results show that our approach provides a framework to quantify information needed by adversaries to launch insider attacks. The proposed approach will improve MANET’s defense against insider attacks, while also reducing incorrect classification of legitimate nodes as jammers.
Highlights
Mobile ad hoc networks (MANETs) are self-organized networks which require distributed, reliable, and flexible networks which provide interdependency and rational decisionmaking
Our approach is unique in that (1) each node in the MANET is defined by a security characteristic function for the coalition formation, (2) each node uses a reputation mechanism to accurately detect insider jamming attack, (3) each node maintains a history of transmission rates for nodes in the coalition, and (4) the combination of transmission rates and reputation values for nodes in the coalition is used to detect insider attacker and exclude it from the coalition
We have been able to show through simulation that a reputation-based coalitional game can help prevent insider attacks in a mobile ad hoc network
Summary
Mobile ad hoc networks (MANETs) are self-organized networks which require distributed, reliable, and flexible networks which provide interdependency and rational decisionmaking. Different from existing works [15, 16] which made use of an alibi-based protocol and a self-healing protocol, respectively, to either detect or recover from a jamming attack, we make use of a reputation-based coalition game to ensure security in the network These approaches are too generalized and might not be implementable for a mobile ad hoc network for which our system is modeled. Instead, follows a game-theoretic approach by (1) implementing a coalition formation algorithm, (2) maintaining the coalition via a reputation mechanism, (3) identifying the insider attackers by setting up a reputation threshold, and (4) excluding the attackers from the coalition by rerouting their paths and randomly changing their channel of transmission This method is fully distributed and does not rely on any trusted central entity to operate at optimal performance. The rest of this paper is organized as follows: in Section 2, we presented relevant works that are closely related to our approach; in Section 3, we presented the network and jammer model; Section 4 describes the proposed defense model; in Section 5, we provide the simulation and result of the model; and, in Section 6, we conclude and present future work
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