RIS-Assisted Secure Transmission Exploiting Statistical CSI of Eavesdropper

Liu, Cen; Tian, Chang; Liu, Peixi

doi:10.1109/globecom46510.2021.9685746

Cited by 6 publications

(12 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our system, there are two types of channels: the direct channel between Alice and Bob (or Eve) hd,;, i = {u, e}, and the RIS-aided cascaded channel G, g, and h. We assume that the direct channel hd,i, i = {u, e} with rich scatters are Rayleigh distributed, while the channel G, g, and h follow a Rician fading, since the LoS components are generally contained in the RIS-aided cascaded channel, which is similar to the model described in [ 40,43,50]. More specifically, the Alice-to-RIS, the RIS-to-Bob, and the RIS-to-Eve mm Wave channels are expressed as followed…”

Section: Channel Modelmentioning

confidence: 99%

“…Specifically, the authors in [30] showed that better performance could be obtained in a robust beamforming design under this type of CSI error model in terms of convergence speed and complexity. To make the secure transmission design more practical, the authors of [37][38][39][40] investigated different performance metrics for RIS-aided systems under imperfect CSI of eavesdroppers, such as the average secrecy rate, energy efficiency, and secrecy outage probability, which proposed different algorithms to improve the security performance. However, we note that all these secure works only considered the scenarios with the imperfect CSI of the eavesdroppers, while no relevant research on analyzing the secure performance of multi-RIS-aided systems considering imperfect CSI of both intended users and eavesdroppers, which is more practical.…”

Section: Introductionmentioning

confidence: 99%

“…• We formulate a robust secure beamforming problem to maximize the worst-case achievable SR under the joint effects of non-neglectable practical issues. Different from the existing RIS-aided work under the imperfect CSI of eavesdroppers [37][38][39][40], our design simultaneously considers the imperfect CSI of both intended users and eavesdroppers and also expanded to the lowresolution shifters case. • To solve this challenging non-convex stochastic optimization problem, we expressed the imperfect CSI model with the random system states and propose robust and low-complexity methods to transform the objective problem into simplified and convex subproblems by combining the benefits of the fractional programming and the stochastic successive convex approximation techniques.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physical Layer Security Enhancement for mmWave System with Multiple RISs and Imperfect CSI

Tu,

Dong,

Zou

et al. 2024

IEICE Trans. Commun.

View full text Add to dashboard Cite

Despite the appealing advantages of reconfigurable intelligent surfaces (RIS) aided mmWave communications, there remain practical issues that need to be addressed before the large-scale deployment of RISs in future wireless networks. In this study, we jointly consider the non-neglectable practical issues in a multi-RYS-aided mm Wave system, which can significantly affect the secrecy performance, including the high computational complexity, imperfect channel state information (CST), and finite resolution of phase shifters. To solve this non-convex challenging stochastic optimization problem, we propose a robust and low-complexity algorithm to maximize the achievable secrete rate. Specially, by combining the benefits of fractional programming and the stochastic successive convex approximation techniques, we transform the joint optimization problem into some convex ones and solve them sub-optimally. The theoretical analysis and simulation results demonstrate that the proposed algorithms could mitigate the joint negative effects of practical issues and yielded a tradeoff between secure performance and complexity/overhead outperforming non-robust benchmarks, which increases the robustness and flexibility of multiple RIS deployments in future wireless networks.

show abstract

Section: Channel Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Physical Layer Security Enhancement for mmWave System with Multiple RISs and Imperfect CSI

Tu,

Dong,

Zou

et al. 2024

IEICE Trans. Commun.

View full text Add to dashboard Cite

show abstract

“…After some algebraic manipulations with ( 14) and (17), and then setting their first order derivatives with respect to the auxiliary variables A 1 and A 2 , respectively, equal to zero, the optimal values for A 1 and A 2 become:…”

Section: Proposed Ris-empowered Mimo Secrecy Designmentioning

confidence: 99%

“…Based on a statistical CSI error model for the RIS-parameterized cascaded channel, the power minimization problem for a system with multiple single-antenna eavesdroppers was considered in [16], where AN was utilized to boost the secrecy performance. Exploiting statistical CSI for a single-antenna eavesdropper, the ergodic secrecy rate maximization problem was studied in [17]. The energy efficiency maximization of a MISO system with multiple legitimate Receivers (RX) and eavesdroppers, was examined in [18] assuming CSI uncertainty at the transmitter with respect to the unintended users.…”

Section: Introductionmentioning

confidence: 99%

Counteracting Eavesdropper Attacks Through Reconfigurable Intelligent Surfaces: A New Threat Model and Secrecy Rate Optimization

Alexandropoulos¹,

Katsanos²,

Wen³

et al. 2022

Preprint

View full text Add to dashboard Cite

<p>The potential of Reconfigurable Intelligent Surfaces (RISs) for energy-efficient and performance-boosted wireless communications is recently gaining remarkable research attention, motivating their consideration for various $5$-th Generation (5G) Advanced and beyond applications. In this paper, we consider a Multiple-Input Multiple-Output (MIMO) Physical Layer Security (PLS) system with multiple data streams including one legitimate passive RIS and one malicious passive RIS, with the former being transparent to the multi-antenna eavesdropper and the latter's presence being unknown at the legitimate multi-antenna transceivers. We first present a novel threat model for the RIS-boosted eavesdropping system and design a joint optimization framework for the eavesdropper's receive combining matrix and the reflection coefficients of the malicious RIS. Focusing next on the secrecy rate maximization problem, we present an RIS-empowered PLS scheme that jointly designs the legitimate precoding matrix and number of data streams, the Artificial Noise (AN) covariance matrix, the receive combining matrix, and the reflection coefficients of the legitimate RIS. The proposed optimization algorithms, whose convergence to at least local optimum points is proved, are based on alternating maximization, minorization-maximization, and manifold optimization, including semi-closed form expressions for the optimization variables. Our extensive simulation results for two representative system setups reveal that, in the absence of a legitimate RIS, transceiver spatial filtering and AN are incapable of offering non-zero secrecy rates, even for malicious RISs with small numbers of elements. However, when an $L$-element legitimate RIS is deployed, confidential communication can be safeguarded against eavesdropping systems possessing even more than a $5L$-element malicious RIS.</p>

show abstract

Optimal Semi-quasi-static Design for An IRS-aided PLS Wireless Communication System

Shi,

Cui,

et al. 2024

2024 IEEE International Conference on Communications Workshops (ICC Workshops)

View full text Add to dashboard Cite

RIS-Assisted Secure Transmission Exploiting Statistical CSI of Eavesdropper

Cited by 6 publications

References 23 publications

Physical Layer Security Enhancement for mmWave System with Multiple RISs and Imperfect CSI

Physical Layer Security Enhancement for mmWave System with Multiple RISs and Imperfect CSI

Counteracting Eavesdropper Attacks Through Reconfigurable Intelligent Surfaces: A New Threat Model and Secrecy Rate Optimization

Optimal Semi-quasi-static Design for An IRS-aided PLS Wireless Communication System

Contact Info

Product

Resources

About