In this paper, we consider the physical-layer security for the primary system in an underlay
cognitive radio model which comprises of a primary source–destination pair, a secondary …

In this paper, we consider data capture of a cognitive radio-based red network in tactical
wireless networks. In the blue (friendly) network, an eavesdropping sensor node is deployed …

In this letter, we consider a cognitive radio network where multiple secondary users (SUs)
share the spectrum bands with multiple primary users (PUs) who are facing security threats …

This paper investigates the effect of multiuser gain provided by the secondary user selection
on the secrecy performance of the primary users. We propose a simple secondary user …

In this paper, we propose a cooperative approach to improve the security of both primary
and secondary systems in cognitive radio multicast communications. During their access to …

Consider an underlay cognitive radio network where an eavesdropper (Eve) targets to
intercept the information exchanging between the primary nodes. The secondary system is …

The ubiquitous trend to the “next generation communication” is a symbol of the
communication arena's need for independence, efficiency and flexibility. Cognitive radio …

In this thesis, physical-layer (PHY) security is investigated, which exploits channel
characteristics, such as noise and multipath fading, in order to ensure confidential …