Security evaluation techniques of Cognitive Radio Network status and challenges

Security model is a protection scheme has a different security service to protect network information against malicious nodes. Its aim to specify and enforce security policies, access rights or any encryption algorithm in the network. There are several cryptography methods and modulation techniques on different locations within the security of communications system use to protect entirely network transmission. Cognitive radio networks (CRN) are intended for utilizing radio spectrum effectively. The network formed by cognitive radio devices achieves dynamic spectrum access by sensing the environment and adapting to the frequencies. But due to its enormous applications in wireless networks demands good security methods to be incorporated in CRN. This paper is reviewed the security evaluation of wireless network in general and cognitive radio network in private case by used Fuzzy Logic method for secure cryptography system cognitive radio network architecture.