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Flexible and wearable battery-free backscatter wireless communication system for colour imaging

npj Flexible Electronics 2024年第1期8卷 761-769页

作者： Jun-Lin Zhan Wei-Bing Lu Cong Ding Zhen Sun Bu-Yun Yu Lu Ju Xin-Hua Liang Zhao-Min Chen Hao Chen Yong-Hao Jia Zhen-Guo Liu Tie-Jun Cui State Key Laboratory of Millimeter Waves School of Information Science and EngineeringSoutheast UniversityNanjing 210096China Center for Flexible RF Technology Frontiers Science Center for Mobile Information Communication and SecuritySoutheast UniversityNanjing 210096China College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Wireless imaging,equippedwith ultralow power wireless communications and energy harvesting(EH)capabilities,have emerged as battery-free and sustainable ***,the challenge of implementing wireless colour imaging in wearable applications remains,primarily due to high power demands and the need to balance energy harvesting efficiency with device *** address these issues,we propose a flexible and wearable battery-free backscatter wireless communication system specially designed for colour *** system features a hybrid RF-solar EH array that efficiently harvests energy from both ambient RF and visible light energy,ensuring continuous operation in diverse ***,flexible materials allow the working system to conform to the human body,ensuring comfort,user-friendliness,and ***,a compact design utilizing a shared-aperture antenna array for simultaneous wireless information and power transfer(SWIPT),coupled with an optically transparent stacked *** design not only optimizes space but also maintains the performance of both communication and EH *** proposed flexible and wearable systems for colour imaging would have potentially applications in environmental monitoring,object detection,and law enforcement *** approach demonstrates a sustainable and practical solution for the next generation of wearable,power-demanding devices.

关键词： communication antenna battery

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First demonstration of an 8-node Mbps quantum access network based on passive optical distribution network facilities

First demonstration of an 8-node Mbps quantum access network...

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Frontiers in Optics + Laser science 2023, FiO, LS 203: Part of Frontiers in Optics + Laser science 2023

作者： Bian, Yiming Pan, Yan Ma, Li Wang, Heng Dou, Jiayi Pi, Yaodi Yang, Jie Li, Yang Huang, Wei Yu, Song Zhang, Yichen Xu, Bingjie State Key Laboratory of Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing100876 China Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

Quantum access network with 8 nodes and a secret key rate of over 6 Mbps per user is firstly demonstrated using passive optical distribution network facilities, paving the way of high-performance and scalable quantum-... 详细信息

ISBN: (纸本)9781957171296

关键词： Frequency division multiplexing Optical networks Passive optical networks Quantum key distribution Signal processing Wavelength division multiplexing

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Experimental demonstration of 4-user quantum access network based on passive optical network 49

Experimental demonstration of 4-user quantum access network ...

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49th European Conference on Optical communications, ECOC 2023

作者： Pan, Yan Bian, Yiming Wang, Heng Dou, Jiayi Shao, Yun Pi, Yaodi Ye, Ting Yang, Jie, 2 Li, Yang Huang, Wei Yu, Song Zhang, Yichen Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China State Key Laboratory of Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781839539954

A 4-user high-compatibility quantum access network using coherent states is experimentally demonstrated based on passive optical network. The achieved average secret key rate is around 4.1 Mbps between the transmitter and each one user, which is two orders-of-magnitude higher than previous demonstrations. © The Institution of Engineering & technology 2023.

关键词： Passive optical networks

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Sharding Technologies in Blockchain: Basics, State of the Art, and Challenges 5th

Sharding Technologies in Blockchain: Basics, State of the...

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5th International Conference on Blockchain and Trustworthy Systems, BlockSys 2023

作者： Zhang, Luyi Wang, Yujue Ding, Yong Liang, Hai Yang, Changsong Li, Chunhai Guangxi Key Laboratory of Cryptography and Information Security School of Computer Science and Information Security Guilin University of Electronic Technology Guilin541004 China Hangzhou Innovation Institute Beihang University Hangzhou310052 China Cyberspace Security Research Center Peng Cheng Laboratory Shenzhen518055 China School of Information and Communication Guilin University of Electronic Technology Guilin541004 China

ISBN: (纸本)9789819981007

Sharding is one of the key technologies of blockchain scalable characteristics widely used in cryptocurrencies, Internet of Things, supply chain management and other fields. It can achieve high performance scaling without reducing the decentralization of blockchain, thus solving the problems of insufficient scalability and low throughput of blockchain. In this paper, the characteristics of some classical sharding technologies are analyzed in terms of performance and implementation. The key mechanisms of sharding are summarized, including sharding formation, reshuffle, intra-shard consensus protocol, and cross-shard protocol. Also, the advantages and shortcomings of typical scalability schemes are summarized, including state channel, DAG, and side chain. We summarize the current challenges faced by sharding technology from intra-shard, and cross-shard, and provide an outlook on the development prospects and future research directions in this field. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Blockchain

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A multi-party logistic regression using the Adam method

A multi-party logistic regression using the Adam method

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Computer, Big Data and Artificial Intelligence (ICCBD+AI), International Conference on

作者： Zongze Li Chaoxi Zhu Wei Zhao Xiaopeng Yu Science and Technology on Communication Security Laboratory Chengdu China

ISBN: (数字)9798350373233

ISBN: (纸本)9798350373240

Secure Multi-Party Computation (MPC) allows multi-party to jointly compute a function while ensuring data security and computation correctness. Nowadays, due to the lack of trust among data holders, various inconveniences arise in data sharing. Secure multi-party computation can partially address such issues by securely enabling computations involving multiple parties’ data while protecting the privacy of each party’s data. In this paper, a secure multi-party Adam method is proposed based on secure multi-party computation, and the non-linear operations in the original scheme are approximated. By optimizing the computation of the power function in the secure multiparty computation protocol, the protocol can compute higher-order Taylor expansions with lower communication complexity and ensuring security. Through the optimization of the secure multi-party computation protocol itself, the proposed multi-party Adam method achieves lower communication overhead and faster convergence speed compared to traditional multi-party gradient descent methods within the same number of iterations.

关键词： Training Technological innovation Logistic regression Protocols Data security Taylor series Multi-party computation

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Data security Storage Scheme For UAV Cluster Based On Distributed Storage

Data Security Storage Scheme For UAV Cluster Based On Distri...

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2023 International Conference on Networking and Network Applications, NaNA 2023

作者： Wu, Kaijun Tian, Bo Wang, Xue Science and Technology on Communication Security Laboratory Chengdu610041 China No.30 Research Institute of China Electronics Technology Group Corporation Chengdu610041 China China Electronics Technology Cyber Security Co. Ltd Chengdu610041 China

ISBN: (纸本)9798350327380

UAVs have been widely used in various fields such as emergency rescue and disaster relief, weather detection, scientific research measurement, aerial surveying and mapping, and military reconnaissance. The concept of unmanned aerial vehicle (UAV) swarm is proposed and used, which solves the disadvantages of a single unmanned aerial vehicle with small load and weak information processing and storage capabilities. UAV swarms integrate computing resources and storage resources through the interconnection of individual UAVs, effectively improving the load capacity and information storage capabilities of unmanned swarms. However, there are many uncertain privacy issues in the use of UAV clusters. UAVs are at risk of being damaged, lost and captured, and the data stored on UAVs will be leaked. Therefore, it is necessary to build a safe storage scheme for unmanned swarm data to ensure that the data of unmanned swarms can be stored and used safely. This paper proposes a UAV cluster data security storage scheme based on distributed storage. Each UAV acts as a storage node to build an interstellar file system for distributed storage and shared files. UAV clusters use this system to encrypt and protect data, redundant fragmentation and distributed storage to realize the concealment and confidentiality of distributed storage and sharing of UAV cluster data. Ensure the integrity of data and enhance the invulnerability of safe storage of UAV cluster data. © 2023 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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The Design Method of Micro-Unit Cryptographic Service Framework

The Design Method of Micro-Unit Cryptographic Service Framew...

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International Conference on Networking and Network Applications (NaNA)

作者： Qi Zhao Bo Tian Yiming Liu Science and Technology on Communication Security Laboratory Chengdu China

In order to adapt to the rapid development of information technology in the digital age, it is necessary to build a general cryptographic service delivery capability to provide security protection for data exchange in various *** services need to be combined with a variety of complex cryptographic technologies to establish a secure foundation. At the same time, the efficiency of implementation must be guaranteed. In order to meet this demand, a micro-unit cryptographic service framework is proposed. Based on microservices, plug-in, service engine and other technologies, a micro-unit crypto service platform supporting functional reconfiguration is designed. The programmable micro-unit crypto component can generate service links according to the quality of service, and provide flexible access methods for crypto service. The crypto function of the client and the server can be divided into fine-granularity units, which can be combined into a more flexible crypto system which can adapt to the rapid change of security requirements and deal with new security threats. Based on this framework, crypto service providers can quickly establish a scalable crypto service system that can adapt to various scenarios, meet different security levels and be easily expanded.

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Multi-scale network for single image deblurring based on ensemble learning module

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Multimedia Tools and Applications 2025年第11期84卷 9045-9064页

作者： Wu, WenBo Pan, Yun Su, Na Wang, JingTao Wu, ShaoChuan Xu, ZeKun Yu, YouJian Liu, YaPeng State Key Laboratory of Media Convergence and Communication Communication University of China Beijing100024 China School of Computer and Cyberspace Security Communication University of China Beijing100024 China School of Electronics and Information Engineering Harbin Institute of Technology Harbin150080 China College of Computer and Control Engineering Northeast Forestry University Harbin150040 China School of Computer and Information Engineering Tianjin Chengjian University Tianjin300384 China School of Computer Science and Technology Anhui University Hefei230601 China

In this paper, we have identified two primary issues with current multi-scale image deblurring methods. On the one hand, the blurring scale is ignored. On the other hand, the context information of images is not fully utilized, and the spatial detail information of images is lost. To better solve the above problems, on top of that, this paper proposes a multi-scale network for single image deblurring. The designed network contains two parts: 1) Ensemble Learning Model: The Weak Learning Model in this module connects multiple weak learners in series to increase network depth. Moreover, through multi-scale feature ensemble module, the output features and intermediate features of different weak learner are integrated, and finally strong learner is used to enhance the features with semantic information at different scales;2) Spatial Feature Enhancement Module: This module can preserve spatial detail information of images and compensate for the disadvantages of losing image spatial details due to continuous downsampling in the Ensemble Learning Model structure. Our proposed deblurring model has been extensively evaluated on several benchmark datasets, and the model achieves superior performance compared to the most advanced deblurring methods. In particular, the peak signal-to-noise ratio (PSNR) and structural similarity index measure (SSIM) values are 33.57 dB and 0.965 on the GoPro dataset, respectively, with PSNR and SSIM improving by 0.49 dB and 0.002 over NAFNet, and 0.65 dB and 0.004 over Restormer. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2024.

关键词： Learning systems

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Boosting Transferability of Adversarial Example via an Enhanced Euler's Method 48

Boosting Transferability of Adversarial Example via an Enhan...

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48th IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2023

作者： Peng, Anjie Lin, Zhi Zeng, Hui Yu, Wenxin Kang, Xiangui Southwest University of Science and Technology MY Sichuan621010 China Science and Technology on Communication Security Laboratory CD Sichuan610041 China Sun Yat-sen University School of Computer Science and Engineering Guangzhou510275 China

ISBN: (纸本)9781728163277

Adversarial examples are intentionally designed images to force convolution neural networks to give error classification outputs. Existing attacks have constructed transferable adversarial examples from the base attack algorithm, data augmentation, ensemble model, etc. Nevertheless, under the black-box case especially facing defense models, the transferability of adversarial examples still needs to be improved. In this paper, we try to develop a better base attack to boost the transferability of adversarial examples. Through analyzing the baseline gradient-based attacks, we found their iterative procedures of updating gradients are similar to numerical Euler's methods. From the perspective of numerical analysis, we employ an enhanced Euler's method, with less approximate errors and thus more accurate, to search a better approximate optimal solution to construct a more transferable gradient-based attack. To this end, we apply two-step gradient calculations of the enhanced Euler's method to correct gradient descent directions. As a base attack, our attacks can be easily integrated with data augmentations and ensemble model augmentations. Experimental results show the proposed augmented attack significantly improves the transferability of adversarial examples and achieves an average attack success rate at least 3% higher than state-of-the-arts under black-box settings with defense mechanisms. © 2023 IEEE.

关键词： Gradient methods

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On Searching Dynamic Feedback with Carry Shift Registers Having Sparse Switches

On Searching Dynamic Feedback with Carry Shift Registers Hav...

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International Conference on communication technology (ICCT)

作者： Sen Hou Yue Cao Science and Technology on Communication Security Laboratory Chengdu China

A bitstring generator is proposed by transferring from one feedback with carry shift register (FCSR) to another under control of an (external) signal, and it is called a dynamic feedback with carry shift register (DFCSR). Cryptographic applications require that the period of sequences generated by each FCSR of a DFCSR should be as large as possible, and for optimal performance the number of switches transferring FCSRs should be as least as possible. In this correspondence a probabilistic algorithm is given to find such required DFCSRs. By theoretical estimation and heuristic experiments, this searching technique is shown to be practically feasible for contemporary cryptographic sizes.

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