Catch me if you can — A proposal mechanism against the cooperative attacks in Cognitive radio networks

With today´s increase in the usage of wireless devices and spectrum allocation, radio spectrum is becoming scarce and it is used partially. This has evolved a concept called the Cognitive radio to exploit the presence of these spectrum holes which utilizes cooperative spectrum sensing concept for primary user detection. This spectrum sensing concept has a drawback that an intruder can capture these sensors and manipulates the sensing reports. Therefore, an attack model is considered and we propose a revised COI (combinatorial optimization identification) algorithm to defend against such attacks. Finally, spectrum allocation to secondary users is made based on the uncompromised sensing reports by filtering out the compromised sensing reports.