Results 251 to 260 of about 13,309 (290)

Keyless asynchronous covert communication

2016 IEEE Information Theory Workshop (ITW), 2016
We 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, Matthieu R. Bloch   +1 more
openaire   +1 more source

Detecting covert communication on Android

37th Annual IEEE Conference on Local Computer Networks, 2012
Using 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, Raquel Hill, Seth Wimberly   +2 more
openaire   +1 more source

Jamming Strategies in Covert Communication

2019
Consider 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, Asaf Cohen 0001, Omer Gurewitz   +2 more
openaire   +1 more source

On Covert Communication with Interference Uncertainty

2018 IEEE International Conference on Communications (ICC), 2018
Covert 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, Jiajia Liu 0001, Yong Zeng 0002, Jianfeng Ma 0001, Qiping Huang   +4 more
openaire   +1 more source

Concurrent Covert Communication Channels

2010
This 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, Hassan Peyravi, Mohammad Abdullah-Al-Wadud, Yoojin Chung   +3 more
openaire   +1 more source

Exact Throughput-Covertness Relation for Covert Communications

GLOBECOM 2022 - 2022 IEEE Global Communications Conference, 2022
Daizhong Yu, Lin Yang 0004, Jiawei Liu, Guangrong Yue   +3 more
openaire   +1 more source

Covert computer and network communications

Proceedings of the 4th annual conference on Information security curriculum development, 2007
The 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), 2018
Much 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, Azadeh Sheikholeslami, Tamara V. Sobers, Boulat A. Bash, Don Towsley, Saikat Guha 0001   +5 more
openaire   +1 more source

On covert communication in advertising

Journal of Pragmatics, 2004
Abstract 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

Covert Communications: A Comprehensive Survey

IEEE Communications Surveys & Tutorials, 2023
Xinying Chen, Jianping An, Zehui Xiong, Chengwen Xing, Nan Zhao 0001, F. Richard Yu, Arumugam Nallanathan   +6 more
openaire   +2 more sources