Cognitive radio is a promising technology aiming to solve the spectrum scarcity problem by allocating the spectrum dynamically to unlicensed users. It uses the free spectrum bands which are not being used by the licensed users without causing interference to the incumbent transmission. So, spectrum sensing is the essential mechanism on which the entire communication depends. If the spectrum sen...

Cognitive radio technology (CR), as a key enabling functionality for the next generation (xG) mobile communication, can remarkably improve the performance of a wireless communication system by being aware of the changes of its surrounding and dynamically modifying its operating parameters to adapt such changes. Recently, the security issues of cognitive radio (CR) networks have drawn more and m...

Primary user emulation attack, which targets distabilizing the queuing dynamics of cognitive radio networks, is studied using game theoretic argument. The attack and defense are modeled as a stochastic game. The Nash equilibrium of the game is studied. In particular, the Lyapunov drift is considered as the reward in each round. Explicit expressions of the Nash equilibrium strategies are obtained.

CR is an emerging technology in wireless communications. Based on their operating environment CRNs can dynamically reconfigure their characteristcics. So that many security issues has been an alarming fact to CRNs. One such attack is the Primary User Emulation Attack (PUEA). There are many techniques available to mitigate this attack. This paper presents a study about various defense techniques...

Cognitive Radio Network (CRN) is an emerging technology used to solve spectrum shortage problems in wireless communications. In CRN, unlicensed secondary users (SUs) and licensed primary (PUs) use resources at the same time by avoiding any interference from SUs. However, sensing process CRN often disturbed a security issue known as Primary User Emulation Attack (PUEA). PUEA one of main issues t...

Address for Correspondence Head of the Department, PG Student, Kamaraj College of Engineering and Technology, Virudhunagar, Tamilnadu India. ABSTRACT In this paper to propose an approach for detecting the presence of malicious attack which is commonly known as primary user emulation attack (PUEA), this type of attack act as the primary signal and delude the secondary user and occupy the whole f...