Physical layer security (PLS) has been extensively explored as an alternative to
conventional cryptographic schemes for securing wireless links. Many studies have shown …

Cyber-security threats and issues have been exponentially increasing over the last two
decades, including in cognitive radio networks. These attacks and vulnerabilities negatively …

Optimal relay selection is investigated for secure cooperative communications against an
adaptive eavesdropper that can perform eavesdropping if the eavesdropping link has good …

In this letter, we investigate the secrecy outage performance of a cooperative non-
orthogonal multiple access (NOMA) network, where a base station (BS) communicates with …

In this paper, we study the secrecy performance of mixed radio-frequency (RF)-free space
optical (FSO) systems by considering both RF and FSO eavesdropper attacks. More …

In this paper, we investigate the secrecy performance of multiuser dual-hop relay networks
where a base station (BS) communicates with multiple legitimate users through the …

This paper studies protograph low-density paritycheck coded cooperation (CC) schemes for
two-hop multi-relay systems with L relays over Nakagami-m quasi-static fading (QSF) …

For cooperative systems, in which an eavesdropper overhears source information through
relays' transmission, an optimal relay selection (ORS) scheme has recently been proposed …

In this letter, a generalized multi-relay selection scheme is proposed to improve the security
in a cooperative relay network. Assuming that only the statistical channel state information of …

Cognitive radio is providing the solution to the challenges of spectrum scarcity. The central
idea behind this technology is to use spectrum without interfering with the rights of primary …