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In this letter, we investigate the security of fluid antenna system (FAS)-reconfigurable intelligent surfaces (RIS) communication systems. The base station (BS) employs a single fixed-position antenna, while both the legitimate receiver and…

Signal Processing · Electrical Eng. & Systems 2024-11-05 Jianchao Zheng , Xiazhi Lai , Tuo Wu , Maged Elkashlan , Daniel Benevides da Costa , Chau Yuen , Fumiyuki Adachi

In this work, we investigate the physical layer security (PLS) of ambient backscatter communication non-orthogonal multiple access (AmBC-NOMA) networks where non-colluding eavesdroppers (Eves) are randomly distributed. In the proposed…

Systems and Control · Electrical Eng. & Systems 2024-12-10 Xinyue Pei , Xingwei Wang , Min Huang , Yingyang Chen , Xiaofan Li , Theodoros A. Tsiftsis

A novel Physical Layer Security (PLS) framework is conceived for enhancing the security of the wireless communication systems by exploiting multi-domain polarization in Multiple-Input Multiple-Output (MIMO) systems. We design a…

Information Theory · Computer Science 2023-11-01 Luping Xiang , Yao Zeng , Jie Hu , Kun Yang , Lajos Hanzo

Reconfigurable intelligent surfaces (RISs) hold significant promise for enhancing physical layer security (PLS). However, conventional RISs are typically modeled using diagonal scattering matrices, capturing only independent reflections…

Signal Processing · Electrical Eng. & Systems 2025-11-20 Weijie Xiong , Jingran Lin , Cunhua Pan , Yilong Zeng , Qiang Li

Physical layer deception (PLD) is a novel security mechanism that combines physical layer security (PLS) with deception technologies to actively defend against eavesdroppers. In this paper, we establish a novel semantic model for PLD that…

Information Theory · Computer Science 2024-10-08 Bin Han , Yao Zhu , Anke Schmeink , Giuseppe Caire , Hans D. Schotten

This paper studies the physical layer security (PLS) of a vehicular network employing a reconfigurable intelligent surface (RIS). RIS technologies are emerging as an important paradigm for the realisation of smart radio environments, where…

Signal Processing · Electrical Eng. & Systems 2019-12-30 Abubakar U. Makarfi , Khaled M. Rabie , Omprakash Kaiwartya , Xingwang Li , Rupak Kharel

The pinching-antenna system (PASS) has been proposed as a promising solution for mitigating line-of-sight (LoS) blockages by dynamically repositioning pinching antennas (PAs) along a dielectric waveguide. This paper develops a…

Signal Processing · Electrical Eng. & Systems 2026-03-03 Zhehang Ye , Ximing Xie , Hao Qin , Xingqi Zhang , Yuanwei Liu

In this paper, we study the problem of physical layer security in large-scale multiple input multiple output (LS-MIMO) systems. The large number of antenna elements in LS-MIMO system is exploited to enhance transmission security and improve…

Information Theory · Computer Science 2014-07-29 Xiaoming Chen , Chau Yuen , Zhaoyang Zhang

Extremely large-scale arrays (XL-arrays) have emerged as a key enabler in achieving the unprecedented performance requirements of future wireless networks, leading to a significant increase in the range of the near-field region. This…

Signal Processing · Electrical Eng. & Systems 2025-04-10 Yunpu Zhang , Yuan Fang , Changsheng You , Ying-Jun Angela Zhang , Hing Cheung So

Reconfigurable-antenna systems have received increasing attention for their ability to adapt wireless channels. However, existing architectures exhibit scenario-dependent limitations: fluid antennas provide strong diversity gains in…

Signal Processing · Electrical Eng. & Systems 2026-05-12 Xiao Lin , Yizhe Zhao , Xiangyang Wang , Halvin Yang , Bingxin Zhang

A reconfigurable pinching-antenna system (PASS) is presented, endowing pinching antennas (PAs) with both amplitude- and phase-controllable radiation beyond conventional implementations. To characterize this feature, a general and physically…

Information Theory · Computer Science 2025-09-09 Zhaolin Wang , Jiaqi Xu , Chongjun Ouyang , Xidong Mu , Yuanwei Liu

This paper investigates physical layer security (PLS) in the intelligent reflecting surface (IRS)-assisted multiple-user uplink channel. Since the instantaneous eavesdropper's channel state information (CSI) is unavailable, the secrecy rate…

Information Theory · Computer Science 2022-05-24 Xiangrui Cheng , Yiliang Liu , Zhou Su , Wei Wang

The pinching-antenna system (PASS) reconfigures wireless links through pinching beamforming, in which the activated locations of pinching antennas (PAs) along dielectric waveguides are optimized. This article investigates the application of…

Signal Processing · Electrical Eng. & Systems 2025-06-03 Shan Shan , Chongjun Ouyang , Yong Li , Yuanwei Liu

This paper investigates the downlink (DL) physical layer security (PLS) in a near-field (NF) extra-large multiple-input multiple-output MIMO (XL-MIMO) system. To enhance the secrecy rate (SR), null-space artificial noise (AN) is transmitted…

Information Theory · Computer Science 2025-03-19 Xiangjun Ma , Ali Arshad Nasir , Daniel Benevides da Costa

Wireless networks have become imperative in all areas of human life. As such, one of the most critical concerns in next-generation networks is ensuring the security and privacy of user data/communication. Cryptography has been…

Signal Processing · Electrical Eng. & Systems 2021-09-30 Muhammad Sohaib J. Solaija , Hanadi Salman , Huseyin Arslan

Satellite communications emerged as a promising extension to terrestrial networks in future 6G network research due to their extensive coverage in remote areas and ability to support the increasing traffic rate and heterogeneous networks.…

Signal Processing · Electrical Eng. & Systems 2023-01-11 Nora Abdelsalam , Saif Al-Kuwari , Aiman Erbad

This paper investigates the physical layer security of non-orthogonal multiple access (NOMA) in large-scale networks with invoking stochastic geometry. Both single-antenna and multiple-antenna aided transmission scenarios are considered,…

Information Theory · Computer Science 2017-01-10 Yuanwei Liu , Zhijin Qin , Maged Elkashlan , Yue Gao , Lajos Hanzo

In this paper, we propose a novel secure random caching scheme for large-scale multi-antenna heterogeneous wireless networks, where the base stations (BSs) deliver randomly cached confidential contents to the legitimate users in the…

Information Theory · Computer Science 2020-02-26 Wanli Wen , Chenxi Liu , Yaru Fu , Tony Q. S. Quek , Fu-Chun Zheng , Shi Jin

The pinching-antenna system (PASS) enables wireless channel reconfiguration through optimized placement of pinching antennas along dielectric waveguides. In this article, a unified analytical framework is proposed to characterize the…

Signal Processing · Electrical Eng. & Systems 2026-02-13 Chongjun Ouyang , Hao Jiang , Zhaolin Wang , Yuanwei Liu , Zhiguo Ding

Most of the well-known fading distributions, if not all of them, could be encompassed by Fox's $H$-function fading. Consequently, we investigate the exact and asymptotic behavior of physical layer security (PLS) over Fox's $H$-function…

Information Theory · Computer Science 2019-05-10 Long Kong , Georges Kaddoum , Hatim Chergui