Secure Non-Orthogonal Multiple Access: An Interference Engineering Perspective

Non-orthogonal multiple access (NOMA) is an efficient approach that can improve spectrum utilization and support massive connectivity for next-generation wireless networks. However, over a channel, the superimposed NOMA signals are highly susceptible to eavesdropping, potentially leading severe leakage of confidential information. In this article, we unleash potential network interference exploit it constructively enhance physi-cal-layer security in particular, three different types interference, including artificial noise, specifically-designed jamming signals, inter-user well engineered intentionally reduce information while mitigating effect on signal reception quality legitimate users, thereby significantly enhancing transmission NOMA. Furthermore, propose engineering strategies more advanced full-duplex NOMA, intelligent reflecting surface cognitive radio multi-cell networks, discuss several open research problems challenges, which could inspire innovative designs secure communications.