Results 11 to 20 of about 3,586 (255)

Covert Communications in a Hybrid DF/AF Relay System [PDF]

Sensors (Basel)
In this paper, we study covert communications in a hybrid decode-and-forward (DF)/ amplify-and-forward (AF) relay system. The considered relay in normal operation forwards messages from a source node to a destination node in either DF or AF mode on ...
Jihwan Moon
core   +2 more sources

Covert communications with a full-duplex receiver in non-coherent rayleigh fading [PDF]

, 2020
In a majority of research on covert communications, knowledge about channel state information (CSI) of main channel and/or warden channel is assumed to be known or partially known.
Zheng, Mengfan, Ling, Cong, Hamilton, Alexander   +2 more
core   +1 more source

COVERT COMMUNICATIONS IN CONTINUOUS-TIME SYSTEMS

, 2021
This dissertation studies covert wireless communications where a transmitter (Alice) intends to transmit messages to a legitimate receiver (Bob) such that the presence of the message is hidden from an attentive warden (Willie). Here we consider pertinent
Li, Ke
core   +1 more source

Steganalysis of compressed speech to detect covert voice over Internet protocol channels [PDF]

, 2011
A network covert channel is a passage along which information leaks across the network in violation of security policy in a completely undetectable manner. This study reveals our findings in analysing the principle of G.723.1 codec that there are `unused'
Tang, S., Huang, Yongfeng, Yip, YJ, Tang, Shanyu, Bao, Chunlan, S. Tang, C. Bao, Huang, Y., Yip, Yau Jim, Y.J. Yip, Bao, C., Y. Huang   +11 more
core   +1 more source

Joint Hovering Height, Power, and Rate Optimization for Air-to-Ground UAV-RSMA Covert Communications

, 2023
In this paper, we investigate covert communications for an unmanned aerial vehicle (UAV)-aided rate-splitting multiple access (RSMA) system in which the UAV transmits to the covert and public users separately while shielding covert transmissions from a ...
Kang Ma, Pengxu Chen, Zhiquan Bai, Heng Chang, Hongwu Liu   +4 more
core   +1 more source

Covert Communication in UAV-Assisted Air-Ground Networks [PDF]

, 2021
Unmanned aerial vehicle (UAV) assisted communication is a promising technique for future wireless networks due to its characteristics of low cost and flexible deployment. However, the high possibility of line-of-sight (LoS) air-ground channels may result
Zhao, Nan, Jiang, X, Niyato, Dusit, Wong, Kai-Kit, Wong, KK, Zhao, N, Chen, X, Zhang, Xiu Yin, Niyato, D, Jiang, Xu, Yin Zhang, X, Chen, Xinying, Tang, Jie, Tang, J   +13 more
core   +1 more source

On Covert Acoustical Mesh Networks in Air

, 2013
— Covert channels can be used to circumvent system and network policies by establishing communications that have not been considered in the design of the computing system.
Michael Goetz, Goetz, Michael, Hanspach, Michael, Michael Hanspach   +3 more
core   +1 more source

Covert rate study for full-duplex D2D communications underlaid cellular networks [PDF]

, 2023
Device-to-device (D2D) communications underlaid cellular networks have emerged as a promising network architecture to provide extended coverage and high data rate for various Internet of Things (IoT) applications.
Taleb, T. (Tarik), She, Y. (Yumei), Yang, B. (Bin), Yang, Y. (Yihuai), Shen, S. (Shikai)   +4 more
core   +2 more sources

Thermally Pre‐Formed Reconfigurable Resistive Random‐Access Memory Crossbar Arrays: A Dual‐Mode Platform for Robust Physically Unclonable Functions and In‐Memory Computing

Advanced Functional Materials, EarlyView.
A reconfigurable RRAM platform utilizing thermally pre‐formed filaments (TPFs) is developed to realize robust hardware security. By exploiting the thermodynamic stochasticity of TPFs, exceptionally reliable physically unclonable functions (PUFs) are achieved.
Seongbin Kwon, Taewon Lee, Dohyeong Kim, Sungmin Hwang, Sungjoon Kim   +4 more
wiley   +1 more source

Optimal covert communications using pulse-position modulation

, 2017
International audienceThis paper shows the optimality of Pulse-Position Modulation (PPM) for covert communications over discrete-memoryless channels. Specifically, the concatenation of a random m-ary outer code of length O(m) and an inner code consisting
Bloch, Matthieu, Matthieu R. Bloch, Saikat Guha, Guha, Saikat   +3 more
core   +1 more source