Results 81 to 90 of about 13,309 (290)

Optimal data hiding in H.264/AVC videos for covert communication

, 2009
[[abstract]]A method using an optimal data hiding technique for covert communication via H.264/AVC videos is proposed. An H.264/AVC video consists of a series of I and P image frames.
G. L. Huang;W. H. Tsai
core  

Covert Communication in Wireless Relay Networks [PDF]

, 2017
Covert communication aims to shield the very existence of wireless transmissions in order to guarantee a strong security in wireless networks.
Shu, Feng, Xiangyun Zhou, Zhou, Xiangyun, Jinsong Hu, Yan, Shihao, Hu, Jinsong, Shihao Yan, Jiangzhou Wang, Wang, Jiangzhou, Feng Shu   +9 more
core   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Carboxylic‐Acid Functionalized Multiwalled Carbon Nanotube‐Alkane‐Based Resistive Temperature Sensor for Cold Chain Applications

Advanced Engineering Materials, EarlyView.
This study presents a reversible temperature sensor with high switching ratio, ∼103. The device is fabricated using PET‐ITO and carbon nanotube dispersions in alkane. Considering its application in cold chain logistics, a proof‐of‐concept with LED is showcased. Thus, a temperature drop below the threshold temperature (crystallization temperature of the
Sunil Kumar Behera, Philippe Marrec, A. Jorge Parola, Madalena Dionísio, Hugo Águas, Andreia F. M. Santos, Hamed Pourkheirollah, Donald Lupo, César A. T. Laia   +8 more
wiley   +1 more source

A covert communication method based on imitating bird calls

Journal of Measurement Science and Instrumentation, 2023
When radio communication is interfered with or radio silence is required, the command and intelligence cannot be transmitted among the armed squads in the forest. So there is a great need for a communication method that can replace radio communication to
JIANG Jiajia, LU Yin, XU Junyu, DUAN Fajie, WANG Xianquan, LIU Wei, FU Xiao   +6 more
doaj  

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

Advanced Engineering Materials, EarlyView.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan, Shuvra Saha, Sumit Hassan Eshan, Rinku Basak, Md. Nahian Al Subri Ivan, Ahmed Murtuza Saleque, Raja Tariqul Hasan Tusher, Sadia Zabin, Md. Abdur Rahman, Yuen Hong Tsang   +9 more
wiley   +1 more source

Behavioral Mimicry Covert Communication

, 2013
Covert communication refers to the process of communicating data through a channel that is neither designed, nor intended to transfer information. Traditionally, covert channels are considered as security threats in computer systems and a great deal of ...
Ahmadzadeh, Seyed Ali
core  

Detecting covert communication channels in raster images

, 2014
Digital image steganography is a method for hiding secret messages within everyday Internet communication channels. Such covert communications provide protection for communications and exploit the opportunities available in digital media.
Chambers, Jarrett, Cusack, Brian
core   +1 more source

Strategy optimization method based on UAVs-assisted detection of covert communication

ETRI Journal
Unmanned aerial vehicles (UAVs) are highly mobile and easily deployabledevices that have become an important component of wireless communica-tion countermeasures.
Xiaohan Wang, Wen Tian, Guangjie Liu, Yuwei Dai   +3 more
doaj   +1 more source

Delay Normalization Technique to Disrupt Covert Timing Channels Using Active Warden [PDF]

EPJ Web of Conferences
Covert channels exploit existing network resources, such as packet headers and timing information, to transfer information in ways not originally intended for communication, making them undetectable by conventional methods.
Uttarwar Vrushali Uday, Dakhane Dhananjay M.   +1 more
doaj   +1 more source