We consider a cognitive wireless powered communication network sharing the spectrum
with a primary network, which faces security threats from eavesdroppers (EAVs). We …

This paper considers a cognitive radio network with a set of secondary users (SUs) who
share a spectrum band licensed to a primary user (PU). The PU is assumed to be …

This paper investigates data traffic offloading by considering a third-party cognitive small cell
with wireless powered user equipments (UEs) providing data traffic offloading service to a …

Aiming at the problem of repetitive spending in the current blockchain e-cash transactions, a
linkable ring signature scheme is proposed for blockchain. Based on the linkability of the …

This paper investigates physical layer security of a pair of legitimate source-destination
nodes in the presence of an eavesdropper. Specifically, the source-destination pair hires a …

The authors propose an optimal joint power control and multi‐band spectrum sensing
scheme for cognitive radio (CR) systems to increase the spectral efficiency and to overcome …

Underutilized wireless channel is a waste of spectral resource. Eavesdropping compromises
data secrecy. How to overcome the two problems with one solution? In this paper, we …

We consider a three-node multicarrier network consisting of a source node, a wireless
powered full-duplex destination node, and an eavesdropper. The destination node is …

This letter investigates the performance of a legitimate surveillance system, where a wireless
powered legitimate monitor aims to eavesdrop a suspicious communication link. Power …

The security issue on the physical layer is of significant challenge yet of paramount
importance for 5G communications. In some previous works, transmit power allocation has …