Results 221 to 230 of about 3,586 (255)
Some of the next articles are maybe not open access.
Keyless asynchronous covert communication
2016 IEEE Information Theory Workshop (ITW), 2016We consider a scenario in which Alice asynchronously communicates with Bob over a Discrete Memoryless Channel (DMC) while escaping detection from an adversary who observes their communication through another DMC. Specifically, Alice transmits codewords of length n and chooses the transmission epoch T uniformly at random among N available time epochs ...
Keerthi Suria Kumar Arumugam +1 more
openaire +1 more source
Covert Communication in Backscatter Radio
ICC 2019 - 2019 IEEE International Conference on Communications (ICC), 2019Covert communication in backscatter radio systems is considered, where the transmitter controls its transmit power to keep the transponder's response hidden, while a warden tries to detect this covert communication. To achieve covertness, we propose a non-conventional transmission scheme where the transmitter emits noise-like signal with transmit power
Khurram Shahzad 0003, Xiangyun Zhou 0001
openaire +1 more source
Detecting covert communication on Android
37th Annual IEEE Conference on Local Computer Networks, 2012Using covert channels, malicious applications on Android-based smartphones are able to subvert the permission system and share data in a potentially untraceable manner. These channels are easy to exploit today, and have enough bandwidth to transmit sensitive information in real-time between collaborating applications.
Michael Hansen +2 more
openaire +1 more source
Jamming Strategies in Covert Communication
2019Consider the communication problem where Alice tries to send a message towards Bob while trying to conceal the presence of communication from a watchful adversary, Willie, which tries to determine if a transmission took place or not. Under the basic settings, where all variables are known to Willie, the total amount of information bits that can be ...
Ori Shmuel +2 more
openaire +1 more source
On Covert Communication with Interference Uncertainty
2018 IEEE International Conference on Communications (ICC), 2018Covert communication can prevent the opponent from knowing that a wireless communication has occurred. If only the additive white Gaussian noise (AWGN) channels and ambient noise are taken into consideration, a square root law was obtained and the result shows that the privacy rate approaches zero asymptotically.
Zhihong Liu +4 more
openaire +1 more source
Concurrent Covert Communication Channels
2010This paper introduces a new steganographic technique in which a set of concurrent hidden channels are established between a sender and multiple receivers. Each channel is protected by a separate key. The method can work with JPEG blocks in which an 8 × 8 block is divided into four non-overlapping sets, each consisting a covert channel that hides a ...
Md. Amiruzzaman +3 more
openaire +1 more source
Exact Throughput-Covertness Relation for Covert Communications
GLOBECOM 2022 - 2022 IEEE Global Communications Conference, 2022Daizhong Yu +3 more
openaire +1 more source
Covert computer and network communications
Proceedings of the 4th annual conference on Information security curriculum development, 2007The ex-filtration of confidential information across communication networks is a challenging problem. It is possible for transmissions to be hidden or masked in such a way to circumvent the security policies of an organization. An objective might be to make contacts "invisible" to all parties except designates.
openaire +1 more source
Covert Communications in a Dynamic Interference Environment
2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2018Much of security research focuses on preventing an adversary from deciphering a message's content, but there are a number of applications that motivate the more challenging goal of “covert” communications: transmitter Alice conveying information to legitimate receiver Bob while preventing a capable and attentive adversary Willie from detecting the ...
Dennis Goeckel +5 more
openaire +1 more source
On covert communication in advertising
Journal of Pragmatics, 2004Abstract This paper investigates the notion of covert communication in advertisements. I begin by discussing the role of intentions in communication, outlining the relevance-theoretic view. Taking the work of Keiko Tanaka (1994/1999. Advertising Language: A Pragmatic Approach to Advertisements in Britain and Japan.
openaire +1 more source