Covert communications
Wireless communication system are facing more and more security threats, and protecting user privacy becomes important. The goal of covert communication is to hide the existence of legitimate transmission as a practical approach. Inspired by the great success of deep reinforcement learning (DRL) on handling challenging optimization problems, DRL is used to optimize covert communication ...In this work, we investigated a covert communication method in wireless networks, which is realized by multiantenna full-duplex single relay. In the first stage, the source node sends covert messages to the relay, and the relay uses a single antenna to send interference signals to the adversary node to protect the covert information being transmitted. In the second stage, the relay decodes and ...
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performance of covert communication compared with adding an external jammer for the fact that a system with an external jammer may cause several issues, such as mobility [8]. The most works about covert communicationare under the premise that the channel state information (CSI) of all channels are known to the transmitter. However, in practice ...Therefore, we can say the man is walking overtly towards the coffee shop but is covertly planning not to go inside. Summary: 1.“Overt” and “covert” may be applied to all kinds of activities. 2.“Overt” means “done or shown openly” while “covert” means “not displayed or openly acknowledged.”. 3.Both terms can be used at ... Abstract and Figures. The paper exploits overt information of non-orthogonal multiple access (NOMA) systems for camouflage to hide covert information. The optimum strategy of hiding information at ...Covert communication can realize the transmission of hidden information between both sides of communication to a certain extent, which makes the ...
Covert communication is critical to guarantee a strong security and secure user privacy. In this work, we consider adversary's noise and channel uncertainties and analyze their impact on adversary's optimum detection performance and the throughput of covert messages. We determine the throughput of covert messages and its gain and loss by having adversary's channel uncertainty and fading ...covert communication in Fifth Generation (5G) wireless networks. The researchers suggest that Alice can transmit a covert message at low power to a user D1 under cov er of another message transmitted1. propose a method for covert communication for a multi-hop UAV network that operates under ad hoc conditions and; 2. derive the mathematical model for a covert transmission method that facilitates covert communication with a low probability of detection. The rest of the paper is structured as follows.covert communications in an IRS-assisted NOMA system, where a legitimate transmitter applies NOMA to communicate with a covert user and a public user against a warden. Our goal is to hide the communication between the legitimate transmitter and the covert user by making full use of the uncertainty inherent in the wireless system environment.Oct 25, 2017 · Understanding Covert Channels of Communication. A covert channel is any communication channel that can be exploited by a process to transfer information in a manner that violates the systems security policy. In short, covert channels transfer information using non-standard methods against the system design.
Jul 29, 2022 · This paper studies the privacy of wireless communications from an eavesdropper that employs a deep learning (DL) classifier to detect transmissions of interest. There exists one transmitter that transmits to its receiver in the presence of an eavesdropper. In the meantime, a cooperative jammer (CJ) with multiple antennas transmits carefully crafted adversarial perturbations over the air to ... Abstract. Covert communication aims to prevent the warden from detecting the presence of communications, i.e. with a negligible detection probability. When the distance between the transmitter and the legitimate receiver is large, large transmission power is needed, which in turn increases the detection probability.Existing covert communication schemes use spread-spectrum, chaotic theory, or a combination of both to achieve covert communication. The proposed schemes vary: utilis-ing machine learning [18], using noise envelopes to mask the signal [24], chaotic spreading and modulation [25,26], and using the message itself to spread the signal [27]. … ….
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Facet is a covert communication system for transmitting censored video, and it relies on the assumption that the observer is unwilling to indiscriminately block all or most sessions of the cover protocol (Skype). To the outside observer, the Facet client is just having a Skype session.Covert communications with friendly jamming in Internet of vehicles. The Internet of Vehicles (IoV) provides an important platform for various applications in diverse vehicular sectors such as the safety, energy-saving, decision-making, routing, and entertainment, which makes vehicular transportation safer, greener, and easier.
Covert Communications: A Comprehensive Survey. Abstract: Information security has always been a critical issue in wireless networks. Apart from other secure techniques, covert communication emerges as a potential solution to security for wireless networks owing to its high-security level.Multi-Antenna Covert Communications with Random Access Protocol Weile Zhang, Nan Zhao, Senior Member, Shun Zhang, and F. Richard Yu, Fellow, IEEE Abstract—In this paper, we consider the issue of covert communications with random access protocol. We consider that the legitimate user Bob has no priori knowledge about packetedge research on wireless communication security has focused on the fundamental limits of covert communications (e.g., [6], [10]–[12]). In covert communications, a transmitter (Alice) desires to transmit information to a legitimate receiver (Bob) without being detected by a warden (Willie), who is collecting observations to detect this ...
do spiders have tails This article presents a review of deep learning-based covert communication scheme for protecting digital contents, devices, and models. In particular, we discuss the background knowledge, current applications, and constraints of existing deep learning-based information hiding schemes, identify recent challenges, and highlight possible research ... paleozoic era plantswhat does being exempt from withholding mean Covert Communication. Covert Communications through Network Configuration Messages: Network covert channels can be defined as a way of transmitting hidden … cause problem solution Nov 17, 2021 · Covert communication is critical to guarantee a strong security and secure user privacy. In this work, we consider adversary’s noise and channel uncertainties and analyze their impact on adversary’s optimum detection performance and the throughput of covert messages. We determine the throughput of covert messages and its gain and loss by having adversary’s channel uncertainty and fading ... Spinning Food: How food industry front groups and covert communications are shaping the story of food. que es yerba mateluellensw 712 The covert communications system used in China was first employed by U.S. security forces in war zones in the Middle East, where the security challenges and tactical objectives are different, the ... kansas jayhawkers Aug 15, 2018 · The covert communications system used in China was first employed by U.S. security forces in war zones in the Middle East, where the security challenges and tactical objectives are different, the ... arboretum overland park kswindsheild surveymonmouth vs kansas Intelligent Reflecting Surface (IRS)-Enabled Covert Communications in Wireless Networks. Xiao Lu, Ekram Hossain, Tania Shafique, Shaohan Feng, Hai Jiang, Dusit Niyato. With growing security threats to the evolving wireless systems, protecting user privacy becomes progressively challenging. Even if the transmitted information is encrypted and ...