Evolution of the Security Models in Cognitive Radio Networks: Challenges and Open Issues

Inclusion of Cognitive Radio Network (CRN) in different networking technologies is proven to offer an efficient communication system due to its potential characteristics of managing the transmission and reception attributes, especially in the wireless environment. CRN harnesses the capability of resisting interference between the licensed users and unlicensed user. However, it is still challenging to countermeasure the level of threats in the wireless medium by CRN. With various research-based solutions towards securing CRN, existing approaches still witness security breach when CRN is deployed over complex networking technologies. Therefore, this paper provides a technical insight in gauging the level of effectiveness in the existing security aspect and facilitates the upcoming researchers with information about the current research gap and possible solutions to leverage the security.