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21st IEEE International Conference on communication technology, ICCT 2021

作者： Luo, Jie Bao, Liang Ni, Lvlin The 30th Research Institute of China Electronics Technology Group Corporation Science and Technology on Communication Security Laboratory Sichuan Chengdu China The Third Research Institute of Ministry of Public Security Key Lab of Information Network Security of Ministry of Public Security Shanghai China

ISBN: (纸本)9781665432061

Shadowsocks (R) is a proxy software based on Socks5, which is the collective name of Shadowsocks and Shadowsocks (R). In order to improves the shortcomings of other softwares breaking internet censorship, Shadowsocks (R) is a private protocol without handshake negotiation mechanism, and pays more attention to high camouflage and high concealment of traffic, which makes it difficult to use common methods(fingerprint identification, port filtering)to identify Shadowsocks (R) traffic[1], This paper proposes a method of Shadowsocks (R) traffic identification from the perspective of the protocol, which extracts features from four dimensions, and inputs features into the machine learning model for training. This method performs secondary identification and statistical filtering on the output of the machine learning model, and finally identifys Shadowsocks (R) traffic. This method has been very well validated in the laboratory environment. © 2021 IEEE.

关键词： Machine learning

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Elastic security zones for NoC-based 3D-MPSoCs

Elastic security zones for NoC-based 3D-MPSoCs

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IEEE International Conference on Electronics, Circuits and Systems (ICECS)

作者： Johanna Sepulveda Guy Gogniat Daniel Flórez Jean-Philippe Diguet Cesar Zeferino Marius Strum Information and Communication Science and Technology Laboratory Laboratory Lab-STICC Université Bretagne Sud France IMicroelectronics Laboratory LME University of São Paulo Brazil Universite de Bretagne-Sud Lorient FR Computer Science Department University of Vale de Itajai UNIVALI Brazil

3D-MPSoCs integrate cores of several vendors and support different applications on a single die, providing large performance and cost reduction. 3D-technology presents many security challenges and offers new opportunities to implement protection countermeasures. 3D-NoCs can be explored to assist the overall security of the system. In this work, we propose a 3D-NoC hardware architecture able to protect the 3D-MPSoCs against software attacks. Dynamic firewalls create elastic security zones by wrapping a set of components according to a trust policy, guaranteeing the protection and efficient execution of all applications. We compare our approach with several 3D-protection proposals and we show that our mechanism performs a fast detection of attacks, decreases the cost of security in terms of power and provides a high level of security.

关键词： Three-dimensional displays Program processors Firewalls (computing) IP networks Computer architecture

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Real-time 4×28Gb/s transmission over 110-km SMF based on dispersion compensation and wavelength selective switch

Real-time 4×28Gb/s transmission over 110-km SMF based on di...

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Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2018

作者： You, Quan Li, Xiang Luo, Ming Huang, Liyan Lin, Jiasheng Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan China State Key Lab of optic communication Wuhan research institute of post and telecommunication China Accelink Technologies Company Ltd Wuhan China

We experimentally demonstrate real-time 4×28-Gb/s transmission over 110 km single mode fiber. Chromatic dispersion pre-compensation and post-compensation are achieved by dispersion compensation fiber and waveleng... 详细信息

ISBN: (纸本)9781943580453

关键词： Single mode fibers

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New quaternary sequences of even length with optimal auto-correlation

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science China(information sciences) 2018年第2期61卷 125-137页

作者： Wei SU Yang YANG Zhengchun ZHOU Xiaohu TANG School of Economics and Information Engineering Southwestern University of Finance and Economics Science and Technology on Communication Security Laboratory School of Mathematics Southwest Jiaotong University Provincial Key Lab of Information Coding and Transmission Institute of Mobile CommunicationsSouthwest Jiaotong University

Sequences with low auto-correlation property have been applied in code-division multiple access communication systems, radar and cryptography. Using the inverse Gray mapping, a quaternary sequence of even length N can be obtained from two binary sequences of the same length, which are called component sequences. In this paper, using interleaving method, we present several classes of component sequences from twin-prime sequences pairs or GMW sequences pairs given by Tang and Ding in 2010; or two, three or four binary sequences defined by cyclotomic classes of order 4. Hence we can obtain new classes of quaternary sequences, which are different from known ones, since known component sequences are constructed from a pair of binary sequences with optimal auto-correlation or Sidel'nikov sequences.

关键词： binary sequences quaternary sequences Gray mapping interleaving cyclotomy

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DarkSAM: Fooling Segment Anything Model to Segment Nothing 38

DarkSAM: Fooling Segment Anything Model to Segment Nothing

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38th Conference on Neural information Processing Systems, NeurIPS 2024

作者： Zhou, Ziqi Song, Yufei Li, Minghui Hu, Shengshan Wang, Xianlong Zhang, Leo Yu Yao, Dezhong Jin, Hai National Engineering Research Center for Big Data Technology and System China Services Computing Technology and System Lab China Cluster and Grid Computing Lab China Hubei Engineering Research Center on Big Data Security China Hubei Key Laboratory of Distributed System Security China School of Computer Science and Technology Huazhong University of Science and Technology China School of Cyber Science and Engineering Huazhong University of Science and Technology China School of Software Engineering Huazhong University of Science and Technology China School of Information and Communication Technology Griffith University Australia

Segment Anything Model (SAM) has recently gained much attention for its outstanding generalization to unseen data and tasks. Despite its promising prospect, the vulnerabilities of SAM, especially to universal adversarial perturbation (UAP) have not been thoroughly investigated yet. In this paper, we propose DarkSAM, the first prompt-free universal attack framework against SAM, including a semantic decoupling-based spatial attack and a texture distortion-based frequency attack. We first divide the output of SAM into foreground and background. Then, we design a shadow target strategy to obtain the semantic blueprint of the image as the attack target. DarkSAM is dedicated to fooling SAM by extracting and destroying crucial object features from images in both spatial and frequency domains. In the spatial domain, we disrupt the semantics of both the foreground and background in the image to confuse SAM. In the frequency domain, we further enhance the attack effectiveness by distorting the high-frequency components (i.e., texture information) of the image. Consequently, with a single UAP, DarkSAM renders SAM incapable of segmenting objects across diverse images with varying prompts. Experimental results on four datasets for SAM and its two variant models demonstrate the powerful attack capability and transferability of DarkSAM. Our codes are available at: https://***/CGCL-codes/DarkSAM. © 2024 Neural information processing systems foundation. All rights reserved.

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An Approach for Analysing and Improving Fault Tolerance in Radio Architectures

An Approach for Analysing and Improving Fault Tolerance in R...

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Proceedings of 2006 IEEE International Symposium on Circuits and Systems,Volume 7

作者： Teijo Lehtonen Pekka Rantala Petri Isomaki Juha Plosila Jouni Isoaho Department of Information Technology Communication Systems Laboratory University of Turku Finland Dept. of Information Technology Communication Systems Lab. Turku Centre for Computer Science (TUCS) Turku Finland

We present an approach for analysing and improving fault-tolerance aspects in radio architectures. This is a necessary step to be taken in order to implement reliable radio systems in future nanoscale technologies. We present problem formulation, optimisation approach and implementation methodology. We are adding fault tolerance at architecture level by taking advantage of existing parallel structures and using a spare module approach in order to minimise hardware overhead needed. These issues have been analysed and demonstrated using two radio case studies: a UMTS MIMO and a GSM diversity receivers.

关键词： Fault tolerance Receivers Diversity reception Computer architecture GSM MIMO Fault tolerant systems Circuit testing Circuit faults 3G mobile communication

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Robust textile-based spoof plasmonic frequency scanning antenna for on-body IoT applications

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science China(information sciences) 2024年第8期67卷 269-284页

作者： Zhao-Min CHEN Jun-Lin ZHAN Hao CHEN Ya LI Hongjun HE Wu YANG Zhen-Guo LIU Wei-Bing LU State Key Lab of Millimeter Waves School of Information Science and EngineeringSoutheast University Center for Flexible RF Technology Frontiers Science Center for Mobile Information Communication and SecuritySoutheast University Future Research Laboratory China Mobile Research Institute Purple Mountain Laboratories

Securing a comfortable, wearable compact frequency beam scanning antenna(FBSA) with robustness to deformation, low specific absorption rate(SAR), and good coverage of the surrounding environment for Internet of Things(IoT) applications, such as on-body navigation and wireless communication is an emerging challenge. In this work, a robust textile-based spoof plasmonic frequency scanning antenna utilizing higher-order modes is presented, which is also robust to deformation caused by the activities of the human body. The innovative design of the element ensures the high-efficiency transmission of the fundamental mode of spoof surface plasmon polaritons(SSPP) structure, providing the potential of being a multifunctional composite device in the compact on-body network. Besides, an artificial magnetic conductor(AMC) is designed underneath the SSPP structure, obtaining a low SAR value(0.113 W/kg), which ensures the safety of users. As a practical realization of this concept, a textile-based spoof plasmonic antenna was fabricated in the microwave regime and the performed experimental results show the proposed antenna has a single-beam radiation characteristic with a 70° beam scanning angle range when the frequency is 4.7–6.0 GHz with a high average realized gain of 13.15 dBi. And it still maintains a steady performance when faced with structure deformation, which proves its robustness. Wireless communication quality experiments are performed to demonstrate the proposed antenna can measure the angles of targets and realize wireless signal transmission to specific targets as the frequency varies, it may find great potential in the field of on-body IoT applications.

关键词： frequency beam scanning antenna (FBSA) Internet of Things (IoT) on-body communication spoof surface plasmon polaritons (SSPP) textile-based antenna

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A PAR-DQ random access preamble detection algorithm in LTE-satellite communication system

A PAR-DQ random access preamble detection algorithm in LTE-s...

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International Conference on Wireless communications and Signal Processing (WCSP)

作者： Jian Wang Gaofeng Cui Yizhou He Li Jian Weidong Wang Yinghai Zhang Information and Electronic Technology Lab Beijing University of Posts and Telecommunications Beijing China Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory Beijing China

ISBN: (纸本)9781479973408

The present random access (RA) scheme in terrestrial LTE (T-LTE) cannot be applied in LTE-satellite system, for the remarkable miss detection probability caused by large difference of propagation delay in satellite communication system. In this paper, a Peak to Average Ratio after Deleting Quasi-users (PAR-DQ) detection algorithm is proposed. The algorithm can deal with the large difference of propagation delay in satellite system. Quasi users are selected based on constraint coefficients which are defined according to difference of propagation delay first. And then, the average of correlation values is calculated after deleting quasi users. Finally, the peak to average ratio is chosen as decision variable in this algorithm. The threshold setting scheme is also presented which can be adjusted according to the required false alarm rate in multi-user scenario. Simulation results manifest that the proposed algorithm can achieve excellent performance in satellite environment.

关键词： Propagation delay Detection algorithms Satellites Correlation Noise Peak to average power ratio Satellite communication

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Geometrical improvement of a noninvasive core temperature thermometer based on numeric modeling and experiment validation

Geometrical improvement of a noninvasive core temperature th...

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7th International Conference on Biomedical Electronics and Devices, BIODEVICES 2014 - Part of 7th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2014

作者： Huang, Ming Tamura, Toshiyo Chen, Wenxi Kitamura, Kei-Ichiro Nemoto, Tetsu Kanaya, Shigehiko Computational Systems Biology Lab Graduate School of Information Science Nara Institute of Science and Technology 8916-5 Takayamacho 630-0192 Ikoma Nara Japan Department of Biological Engineering Osaka Electro-Communication University 18-8 Hatcho 572-8530 Neyagawa Osaka Japan Biomedical Information Technology Lab University of Aizu Tsuruga 965-8580 Aizu-wakamatsu Fukushima Japan Department of Laboratory Science Kanazawa University 920-0942 Kanazawa Ishikawa Japan

ISBN: (纸本)9789897580130

This paper describes the improvement of a transcutaneous core temperature thermometer by modifying the configuration, in terms of height and radius, of the thermometer using the so-called dual-heat-flux (DHF) method. The motivation of these modifications is to decrease the volume of the thermometer so as to reduce the transverse heat flow inside, in other words, to preserve the underlying assumption of the DHF method that heat flows from the inner part of human body through skin onto the thermometer longitudinally. The modification's effect is evaluated by both numeric modeling based on finite element method and experiment. The results of simulations and experiments show that a lower-in-height and larger-in-radius configuration will improve the accuracy of the thermometer. Prototypes of 22.0 mm radius can attain satisfactory accuracy with error less than 0.5°C when heights are 8.0 mm or less. Copyright © 2014 SCITEPRESS - science and technology Publications. All rights reserved.

关键词： Finite element method

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Few-mode fibre-optic microwave photonic links

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Light(science & Applications) 2017年第1期6卷 684-691页

作者： He Wen Hongjun Zheng Qi Mo Amado Manuel Velázquez-Benítez Cen Xia Bin Huang Huiyuan Liu Huang Yu Pierre Sillard Jose Enrique Antonio Lopez Rodrigo Amezcua Correa Guifang Li CREOL The College of Optics and PhotonicsUniversity of Central FloridaOrlandoFL 32816USA The College of Precision Instruments and Opto-Electronics Engineering Tianjin UniversityTianjin 300072China School of Physics Science and Information Technology Shandong Provincial Key Lab of Optical Communication Science and TechnologyLiaocheng UniversityShandong 252059China State Key Laboratory of Optical Communication Technologies and Networks FiberHome Telecommunication Technologies Co.LtdWuhan Research Institute of Posts and TelecommunicationsNo.88 Youkeyuan RoadHongshan DistrictWuhan 430074China Prysmian Group Parc des Industries Artois FlandresHaisnes 62092France

The fibre-optic microwave photonic link has become one of the basic building blocks for microwave *** the optical power at the receiver is the best way to improve all link performance metrics including gain,noise figure and dynamic *** though lasers can produce and photodetectors can receive optical powers on the order of a Watt or more,the power-handling capability of optical fibres is orders-of-magnitude *** this paper,we propose and demonstrate the use of few-mode fibres to bridge this power-handling gap,exploiting their unique features of small acousto-optic effective area,large effective areas of optical modes,as well as orthogonality and walk-off among spatial *** specially designed few-mode fibres,we demonstrate order-of-magnitude improvements in link performances for single-channel and multiplexed *** work represents the first step in few-mode microwave *** spatial degrees of freedom can also offer other functionalities such as large,tunable delays based on modal dispersion and wavelength-independent lossless signal combining,which are indispensable in microwave photonics.

关键词： analogue optic-fibre link few-mode fibre fibre nonlinearity microwave photonics space-division multiplexing

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