Abstract
Spectrum scarcity and the number of mobile users accessing the spectrum are increasing radically, as a complement to this, under utilization of the licensed spectrum also subsist day by day. Hence, in this paper, a solution has been devised to efficiently access the unused spectrum of the licensed user to eradicate the crowded spectrum shortage. A fusion center based authenticated framework has been established to accommodate licensed Primary Users (PUs) and secondary users. The licensed Primary User (PU), updates its information to the Fusion Center (FC1) and the updated information is encrypted and uploaded to the cloud environment. Subsequently, Fusion Center (FC2) communicating with the cloud environment, downloads the PU information. The authenticated secondary users connected with FC2 were given access to the spectrum based on priority and their signal conditioning. This proposed methodology also evades the Primary user emulation attack by adopting encryption algorithms. Further, Confidentiality, Integrity, and Authentication were also guaranteed while accessing the cloud framework. Various communication and security metrices were estimated to validate the proposed system.
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