Game-theory-based analysis on interactions among secondary and malicious users in coordinated jamming attack in cognitive radio systems
This addresses security vulnerabilities in cognitive radio systems, such as those in IEEE 802.22, by providing a strategic defense mechanism against jamming attacks, though it appears incremental as it applies existing game theory to a specific domain problem.
The paper tackled coordinated jamming attacks in cognitive radio systems by proposing a game-theoretical method to analyze interactions between secondary and malicious users, resulting in the identification of optimal bands and switching probabilities using Nash equilibrium.
IEEE 802.22 standard utilizes cognitive radio (CR) techniques to allow sharing unused spectrum band. The cognitive radio is vulnerable to various attacks such as jamming attacks. This paper has focused on coordinated jamming attacks. A simple strategy for secondary users is to change their bands and switch to other appropriate bands when the jamming attack is occurred. Also, the malicious users should switch to other bands in order to jam the secondary users. To address this problem, a game theoretical method is proposed to analyze coordinated jamming attacks in CR. Then, using Nash equilibrium on the proposed game, the most appropriate bands have been found to switch as well as the optimal switching probabilities for both secondary and malicious users. Meanwhile, effects of different parameters like the number of malicious users are investigated in changing the optimal switching probabilities by analysis on the model.