A Systematic Survey for Detecting and Counteracting PUE Attacks in CWSNs

Cognitive Wireless Sensor Networks (CWSN) uses the spectrum resources in an intelligent manner in comparison to a normal Wireless Sensor Network (WSN). The technique which enables CWSNs in this regard is known as Opportunistic Spectrum Sensing (OSS) for data transfer. The OSS process significantly reduces the collisions and the delays for data delivery in a network. This OSS process is vulnerable to several security threats. A Primary User Emulation (PUE) attack in CWSN is a sort of Denial of Service (DoS) attack wherein hostile Secondary Users (SU) strive to imitate Primary Users (PUs) in effort to expand their personal spectrum intake or to prohibit other SUs from getting the spectrum. In this survey, we discussed the PUE attack and its associated dangers in CWSNs, as well as categorized the available state-of-the-art PUE attack detection strategies.