Covert Transmission Assisted by Intelligent Reflecting Surface

Si, Jiangbo; Li, Zan; Zhao, Yan; Cheng, Julian; Guan, Lei; Shi, Jia; Al-Dhahir, Naofal

doi:10.1109/tcomm.2021.3082779

Cited by 71 publications

(15 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Its core idea is to use a smartly controlled metasurface to reshape undesirable propagation conditions that might divulge secret messages. Si et al utilized IRS to realize covert communication for the first time [76]. This work formulated a joint transmit beamforming and IRS phase shift optimization problem to maximize the covert transmission rate subject to a covertness constraint.…”

Section: B Weakening Signal Leakagementioning

confidence: 99%

Covert Communications in Satellite Internet: A Survey

Guo¹,

He²,

Zhang³

et al. 2022

J-NaNA

View full text Add to dashboard Cite

The broadcast nature of wireless channels and broad coverage brings significant challenges to the security of Satellite Internet. Recently, a new security paradigm named covert communication aims to enhance security by hiding the transmission process and has received great research attention. Various covert transmission schemes were proposed to achieve covertness for different network scenarios. Motivated by the importance of promising security techniques, this survey provides a comprehensive overview of the recent works on covert communication in Satellite Internet for the first time. We first introduce the basic architecture and characteristics of Satellite Internet, as well as its access security challenges. Then, an in-depth overview of covert communication technologies is provided with an emphasis, which is divided into two categories, i.e., traditional ones and information theory-based ones. Finally, several key challenges and future research directions on covert communication are presented.

show abstract

Section: B Weakening Signal Leakagementioning

confidence: 99%

Covert Communications in Satellite Internet: A Survey

Guo¹,

He²,

Zhang³

et al. 2022

J-NaNA

View full text Add to dashboard Cite

show abstract

“…Differently, in [107], the authors jointly optimized transmit beamforming vectors and IRS continuous phase shift subject to transmit power constraints and covertness constraints for IRS-aided single and multiple antenna transmitter scenarios. Both scenarios consider the case of either instantaneous or partial CSI of the warden's link.…”

Section: ) State-of-the-artmentioning

confidence: 99%

Reconfigurable Intelligent Surface Aided Multi-User Communications: State-of-the-Art Techniques and Open Issues

Munochiveyi

Pogaku

Do³

et al. 2021

IEEE Access

View full text Add to dashboard Cite

Reconfigurable intelligent surface (RIS)-aided communication is considered as an exciting research topic in academic and industrial communities since it provides an emerging affordable solution to achieve high quality and secure next-generation wireless systems. Especially, the deployment of RIS in multi-user wireless networks promises to reduce system hardware costs, signal processing complexity, as well as energy consumption due to small size, lightweight and ability to actively shape the wireless propagation environment. Further, by realizing a cost-effective radio environment, RIS-aided communication can be implemented to be an appealing technology for future integration with other emerging wireless applications and communication systems. Despite the positive appeal, RISs face new challenges that hinder integrating efficiently into wireless networks, such as network secrecy performance and system sum-rates, as well as achieving efficient deployment design in highly dynamic and time-varying wireless environments. To this end, we overview recent state-of-the-art techniques to address the above issues faced in the integration of RISs with various emerging multi-user communication techniques, such as Unmanned Aerial Vehicles (UAVs), Non-Orthogonal Multiple Access (NOMA), Millimeter Wave (mmWave) and Terahertz (THz) communications, Physical Layer Security (PLS), massive antennas, and Simultaneous Wireless Information and Power Transfer (SWIPT). Finally, we highlight promising future research directions of RIS-aided communication in Cell-Free Massive Multiple-Input-Multiple-Output (MIMO) systems, Rate-Splitting Multiple Access (RSMA), Light Fidelity (LiFi), and Cognitive Radio (CR) systems.

show abstract

“…Although the SRL indicates that the asymptotic achievable rate under the covert requirement approaches zero, many researchers have shown that the SRL limit can be beaten by exploiting additional techniques in the considered covert communication scenario. These methods include: taking advantage of the ignorance of the transmission time at Willie [19]; applying an intelligent reflecting surface [20]- [22]; exploring the molecular absorption or scattering feature of the Terahertz spectrum [23], [24]; cooperative jamming [25] or uninformed jamming [26]- [29]; jointly optimizing the beam training and data transmission for millimeter-wave communication [30]; exploiting the uncertainty noise power or channel state information (CSI) at Willie [31]- [35]; robust beamforming design [36], [37], over a finite number of channel uses [38]; applying a full-duplex transceiver [39]- [42]; intermediate relay [43], [44] or exploring unmanned aerial vehicle (UAV) as mobile relay [45], [46].…”

Section: Introductionmentioning

confidence: 99%

Optimal Probabilistic Constellation Shaping for Covert Communications

Haihong

et al. 2022

IEEE Trans.Inform.Forensic Secur.

Self Cite

View full text Add to dashboard Cite

In this paper, we investigate the optimal probabilistic constellation shaping design for covert communication systems from a practical view. Different from conventional covert communications with equiprobable constellations modulation, we propose non-equiprobable constellations modulation schemes to further enhance the covert rate. Specifically, we derive covert rate expressions for practical discrete constellation inputs for the first time. Then, we study the covert rate maximization problem by jointly optimizing the constellation distribution and power allocation. In particular, an approximate gradient descent method is proposed for obtaining the optimal probabilistic constellation shaping. To strike a balance between the computational complexity and the transmission performance, we further develop a framework that maximizes a lower bound on the achievable rate where the optimal probabilistic constellation shaping problem can be solved efficiently using the Frank-Wolfe method. Extensive numerical results show that the optimized probabilistic constellation shaping strategies provide significant gains in the achievable covert rate over the state-of-the-art schemes.

show abstract

Covert Transmission Assisted by Intelligent Reflecting Surface

Cited by 71 publications

References 33 publications

Covert Communications in Satellite Internet: A Survey

Covert Communications in Satellite Internet: A Survey

Reconfigurable Intelligent Surface Aided Multi-User Communications: State-of-the-Art Techniques and Open Issues

Optimal Probabilistic Constellation Shaping for Covert Communications

Contact Info

Product

Resources

About