Secrecy Outage Analysis of Multiuser Downlink Wiretap Networks With Potential Eavesdroppers

Son, Woong; Nam, Hyunwoo; Shin, Won-Yong; Jung, Bang Chul

doi:10.1109/jsyst.2020.3007434

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…The eavesdropping attack scenario in which a malicious device attempts to overhear a private message between legitimate devices is constantly being considered as an important security issue in the literature [ 14 ]. Eavesdropping scenarios with the PLS can be classified into three scenarios: passive, active, and potential eavesdropping scenarios [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. A passive eavesdropper (EVE) always attempts to overhear the private message and does not take any other proactive actions [ 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…By contrast, an active EVE not only attempts to overhear the private message, but also induces some malfunction, such as artificial noise, a jamming attack, pilot contamination, or fake information feedback [ 16 , 17 ]. The concept of the potential EVE was introduced in [ 20 , 21 , 22 , 23 ]. The term potential is used in the sense that the EVEs may operate as legitimate devices in some instances.…”

Section: Introductionmentioning

confidence: 99%

“…For example, in multi-user uplink cellular networks, all unscheduled legitimate users in a certain cell are defined as potential EVEs in [ 21 ], and some of the unscheduled users in a certain cell are defined as potential EVEs in [ 22 ]. Furthermore, in multi-user downlink cellular networks, potential EVEs can attempt to overhear legitimate communications of other cellphones or participate in their own legitimate communications [ 20 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Youn

Son

Jung

2021

Sensors

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Recently, reconfigurable intelligent surfaces (RISs) have received much interest from both academia and industry due to their flexibility and cost-effectiveness in adjusting the phase and amplitude of wireless signals with low-cost passive reflecting elements. In particular, many RIS-aided techniques have been proposed to improve both data rate and energy efficiency for 6G wireless communication systems. In this paper, we propose a novel RIS-based channel randomization (RCR) technique for improving physical-layer security (PLS) for a time-division duplex (TDD) downlink cellular wire-tap network which consists of a single base station (BS) with multiple antennas, multiple legitimate pieces of user equipment (UE), multiple eavesdroppers (EVEs), and multiple RISs. We assume that only a line-of-sight (LOS) channel exists among the BS, the RISs, and the UE due to propagation characteristics of tera-hertz (THz) spectrum bands that may be used in 6G wireless communication systems. In the proposed technique, each RIS first pseudo-randomly generates multiple reflection matrices and utilizes them for both pilot signal duration (PSD) in uplink and data transmission duration (DTD) in downlink. Then, the BS estimates wireless channels of UE with reflection matrices of all RISs and selects the UE that has the best secrecy rate for each reflection matrix generated. It is shown herein that the proposed technique outperforms the conventional techniques in terms of achievable secrecy rates.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Youn

Son

Jung

2021

Sensors

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“…Recently, physical-layer security has also been extended to multi-user MIMO channels [22,27,28]. But most existing works only consider noise to evaluate secrecy capacity of multi-user networks and there is still a lack of fine-grained investigation of interference impact on network secrecy [19,22,29].…”

Section: Introductionmentioning

confidence: 99%

Secrecy Capacity of Time Reversal Beamforming for Multi-User MIMO System under Spatial Correlation

Sun

et al. 2021

Security and Communication Networks

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In this paper, for strengthening the security of wireless transmission system, the time reversal (TR) beamforming method is proposed for the downlink of multi-user MIMO system with multiple users who potentially act as eavesdroppers. We develop a multi-input, single-output, multi-eavesdropper (MISOME) wiretap channel model in which Rayleigh fading and spatial correlation are taken into account. Using the proposed model, we further analyze the confidentiality provided by TR beamforming and we use achievable secrecy rates as our performance metrics. In particular, we derive novel closed-formed expressions for the average secrecy-SINR and the mean secrecy sum-rate in order to characterize the influences of propagation conditions on network secrecy metrics. These expressions provide deeper insights into the impact of network interference on communication confidentiality. We find that TR beamforming can deliver the maximum secrecy capacity potential in uncorrelated Rayleigh channels and achieve perfect confidential communication without any extra secrecy cost. On the other hand, even weak inter-user correlation may cause a significant loss of achievable secrecy sum-rate and therefore result in high secrecy cost. But benefiting more from larger signal bandwidth and rich-scattering environment, the TR beamforming technique is still an attractive and cost-effective solution for low-power indoor applications.

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Secret DMT Analysis for a Multiuser MIMO Fading Channel

Roostaei,

Derakhtian

2024

Wireless Pers Commun

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Secrecy Outage Analysis of Multiuser Downlink Wiretap Networks With Potential Eavesdroppers

Cited by 6 publications

References 8 publications

Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Secrecy Capacity of Time Reversal Beamforming for Multi-User MIMO System under Spatial Correlation

Secret DMT Analysis for a Multiuser MIMO Fading Channel

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