Results 111 to 120 of about 83,946 (258)

Detecting Malicious Devices in IPSEC Traffic with IPv4 Steganography

Applied Sciences
This study investigates the application of steganography for enhancing network security by detecting and promptly eliminating malicious packets to prevent flooding and consequent denial of service attacks while also identifying malicious equipment.
Gabriel Jekateryńczuk, Damian Jankowski, René Veyland, Zbigniew Piotrowski   +3 more
doaj   +1 more source

IEEE Access Special Section Editorial: Latest Advances and Emerging Applications of Data Hiding

IEEE Access, 2016
Data hiding is the science and art of imperceptibly embedding some secret data, e.g., marks or messages, into a host media. The secret data are detected and extracted at a receiving end for various purposes.
Yong Xiang, Jiwu Huang, Fernando Perez-Gonzalez, Guang Hua, Hafiz Malik   +4 more
doaj   +1 more source

Understanding and Circumventing Failure Mechanisms in Chalcogenide Optical Phase Change Material Ge2Sb2Se4Te

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
Chalcogenide optical PCMs have gathered interest for their potential in compact, non‐volatile optics and photonics. Free‐space PCM metasurfaces require new considerations from phase change memory that need to be addressed for reliable scale‐up. Several failure mechanisms pertaining to free‐space PCM devices and layout methods are isolated to prevent ...
Cosmin Constantin Popescu, Kiumars Aryana, Brian Mills, Tae Woo Lee, Louis Martin‐Monier, Luigi Ranno, Jia Xu Brian Sia, Khoi Phuong Dao, Hyung‐Bin Bae, Vladimir Liberman, Steven A. Vitale, Myungkoo Kang, Kathleen A. Richardson, Carlos A. Ríos Ocampo, Dennis Calahan, Yifei Zhang, William M. Humphreys, Hyun Jung Kim, Tian Gu, Juejun Hu   +19 more
wiley   +1 more source

CCM-FL: Covert communication mechanisms for federated learning in crowd sensing IoT

Digital Communications and Networks
The past decades have witnessed a wide application of federated learning in crowd sensing, to handle the numerous data collected by the sensors and provide the users with precise and customized services.
Hongruo Zhang, Yifei Zou, Haofei Yin, Dongxiao Yu, Xiuzhen Cheng   +4 more
doaj   +1 more source

Covert Communication via Action-Dependent States

IEEE Transactions on Information Theory
This paper studies covert communication over channels with ADSI when the state is available either non-causally or causally at the transmitter. Covert communication refers to reliable communication between a transmitter and a receiver while ensuring a low probability of detection by an adversary, which we refer to as `warden'.
Hassan ZivariFard, Xiaodong Wang
openaire   +3 more sources

Correlative Super‐Resolution Imaging of Cellular Nanopores Facilitated by Transparent Polymer Waveguide Chips

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
Correlative super‐resolution optical imaging of the ultrastructure of rat liver sinusoidal endothelial cells (LSECs) across a large field of view (FOV) with 3D structured illumination microscopy (3D‐SIM) and single‐molecule localization microscopy (SMLM), facilitated by a transparent polymer photonic waveguide chip, is presented.
Surjendu Bikash Dutta, Jasmin Celine Schürstedt‐Seher, Anders Kokkvoll Engdahl, Wolfgang Hübner, Stefan Belle, Karolina Szafranska, Peter McCourt, Ralf Hellmann, Mark Schüttpelz, Thomas Huser   +9 more
wiley   +1 more source

A Multi‐Resonant Tunable Fabry‐Pérot Cavity for High Throughput Spectral Imaging

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
This study introduces a multi‐resonant tunable Fabry‐Pérot filter for high throughput spectral imaging. With a spectral resolution of 10 nm and a switching time of 23 ms, this compact and low‐cost device possesses better spectral imaging accuracy in poor light conditions while maintaining over six times higher optical throughput than standard liquid ...
Xiao Wu, Zijian Lin, Shige Tang, Xiao Chen, Tingbiao Guo, Sailing He   +5 more
wiley   +1 more source

Development of High‐Performance Multilayer Monochromators

Advanced Optical Materials, EarlyView.
Detailed insights into the optical and multilayer design of Double Multilayer Monochromators (DMM) are presented and fully characterized, including key optimization strategies and solutions to fabrication challenges. By integrating in‐house Ion Beam Figuring and a high uniformity multilayer coating process, the developed DMMs achieve high reflectivity,
Wadwan Singhapong, Arindam Majhi, Wai Jue Tan, Vishal Dhamgaye, Riley Shurvinton, Paresh Pradhan, Igor Dolbnya, Lucia Alianelli, Chris Bowen, Alexander J. G. Lunt, Hongchang Wang, Kawal Sawhney   +11 more
wiley   +1 more source

Covert Multi-Access Communication with a Non-Covert User

ICC 2024 - IEEE International Conference on Communications
In this paper, we characterize the fundamental limits of a communication system with three users (i.e., three transmitters) and a single receiver where communication from two covert users must remain undetectable to an external warden. Our results show a tradeoff between the highest rates that are simultaneously achievable for the three users.
Bounhar, Abdelaziz, Sarkiss, Mireille, Wigger, Michèle   +2 more
openaire   +2 more sources

Distributed Bragg Reflector Based on Plasmonic Ag: Plasma Polymer Nanocomposites

Advanced Optical Materials, EarlyView.
This paper presents a comprehensive approach for the optical design and validation of silver nanocomposite‐based Distributed Bragg Reflectors (DBRs). It describes deriving material properties (n, k) and using them to predict the performance of the deposited optical stack, as well as to characterize imperfections in the DBR deposition, or even to ...
Zdeněk Krtouš, Pavel Pleskunov, Tereza Košutová, Milan Dopita, Ondřej Kylián, Bill Baloukas, Ludvík Martinu, Jaroslav Kousal   +7 more
wiley   +1 more source