Location Privacy in Cognitive Radio Networks: A Survey
Mohamed Grissa, Bechir Hamdaoui, Attila A. Yavuz

TL;DR
This survey reviews location privacy risks in cognitive radio networks, analyzing vulnerabilities, attacks, and countermeasures, and highlights open research challenges to protect user privacy while enabling spectrum efficiency.
Contribution
It provides a comprehensive analysis of location privacy issues in CRNs, identifying vulnerabilities, summarizing existing attacks and defenses, and outlining future research directions.
Findings
Multiple privacy threats identified in CRN components
Various attack and defense mechanisms summarized
Open research problems highlighted for future work
Abstract
Cognitive radio networks (CRNs) have emerged as an essential technology to enable dynamic and opportunistic spectrum access which aims to exploit underutilized licensed channels to solve the spectrum scarcity problem. Despite the great benefits that CRNs offer in terms of their ability to improve spectrum utilization efficiency, they suffer from user location privacy issues. Knowing that their whereabouts may be exposed can discourage users from joining and participating in the CRNs, thereby potentially hindering the adoption and deployment of this technology in future generation networks. The location information leakage issue in the CRN context has recently started to gain attention from the research community due to its importance, and several research efforts have been made to tackle it. However, to the best of our knowledge, none of these works have tried to identify the…
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