Wireless Engineering and Technology, 2016, 7, 105-117 http://www.scirp.org/journal/wet ISSN Online: 2152-2308 ISSN Print: 2152-2294 DOI: 10.4236/wet.2016.74011 October 21, 2016 Efficient Selfish Attack Detection in Cognitive Radio Network Shailaja C. Patil 1 , Amrita Janardhanan 2 1 Department of E&TC, RSCOE, Thathwade, Pune, India 2 Savitribai Phule Pune University, Pune, India Abstract The main intention of developing cognitive radio technology is to solve the spec- trum deficiency problem by allocating the spectrum dynamically to the unlicensed clients. An important aim of any wireless network is to secure communication. It is to help the unlicensed clients to utilize the maximum available licensed bandwidth, and the cognitive network is designed for opportunistic communication technology. Selfish attacks cause serious security problem because they significantly deteriorate the performance of a cognitive network. In this paper, the selfish attacks have been identi- fied using cooperative neighboring cognitive radio ad hoc network (COOPON). A novel technique has been proposed as ICOOPON (improvised COOPON), which shows improved performance in selfish attack detection as compared to existing technique. A comparative study has been presented to find the efficiency of proposed technique. The parameters used are throughput, packet delivery ratio and end to end delay. Keywords Cognitive Radio Network, ICOOPON, COOPON, Selfish Attack 1. Introduction The significant growth in wireless networks leads the spectrum to an extreme usage. Cognitive radio is one of the intelligent wireless based communication technologies [1] [2]. To make a better use of the spectrum, Cognitive Radio Networks (CRNs) are used that easily get adapted to the changes in the network. It solves the spectrum shortage problem by allowing unlicensed secondary users to use spectrum band of primary user (PU) without interference [3]. In order to make the maximum utilization of available spectrum bands the secondary user could adopt cognitive radio communication me- How to cite this paper: Patil, S.C. and Janardhanan, A. (2016) Efficient Selfish At- tack Detection in Cognitive Radio Network. Wireless Engineering and Technology, 7, 105-117. http://dx.doi.org/10.4236/wet.2016.74011 Received: July 9, 2016 Accepted: October 18, 2016 Published: October 21, 2016 Copyright © 2016 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access