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International Conference on Circuits, System and Simulation (ICCSS)

作者： Yingying Chi Zhe Zheng Research Department of Smart Chip Global Energy Interconnection Research Institute Co. Ltd. Beijing China State Grid Key Laboratory of Information & Network Security State Grid Laboratory of Electric Power Communication Network Technology Beijing China

ISBN: (纸本)9781538678206

This paper presents a complete Register Transfer Level (RTL) design of Direct Memory Access (DMA) controller which is compliable with the Advanced Highperformance Bus (AHB). The DMA is integrated in Cortex-M3-based system-on-chip (SoC) designed for power-grid-dedicated wireless communication system based on IEEE 802.11ah protocol. The hardware implementation and prototype verification indicate that by allowing hardware devices working at different frequencies to communicate with each other without relying on the heavy outage load of CPU, the proposed DMA controller realizes the good convergence with the whole system and improves the overall performance with low power consumption.

关键词： Registers Hardware Writing Wireless communication Data transfer System-on-chip

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An underwater image enhancement benchmark dataset and beyond

arXiv

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arXiv 2019年

作者： Li, Chongyi Guo, Chunle Ren, Wenqi Cong, Runmin Hou, Junhui Kwong, Sam Tao, Dacheng Department of Computer Science City University of Hong Kong Kowloon999077 Hong Kong State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences China School of Electrical and Information Engineering Tianjin University Tianjin China Institute of Information Science Beijing Jiaotong University Beijing100044 China Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing Jiaotong University Beijing100044 China City University of Hong Kong Shenzhen Research Institute Shenzhen51800 China UBTECH Sydney Artificial Intelligence Centre School of Information Technologies Faculty of Engineering and Information Technologies University of Sydney 6 Cleveland St DarlingtonNSW2008 Australia

Underwater image enhancement has been attracting much attention due to its significance in marine engineering and aquatic robotics. Numerous underwater image enhancement algorithms have been proposed in the last few years. However, these algorithms are mainly evaluated using either synthetic datasets or few selected real-world images. It is thus unclear how these algorithms would perform on images acquired in the wild and how we could gauge the progress in the field. To bridge this gap, we present the first comprehensive perceptual study and analysis of underwater image enhancement using large-scale real-world images. In this paper, we construct an Underwater Image Enhancement Benchmark (UIEB) including 950 real-world underwater images, 890 of which have the corresponding reference images. We treat the rest 60 underwater images which cannot obtain satisfactory reference images as challenging data. Using this dataset, we conduct a comprehensive study of the state-of-the-art underwater image enhancement algorithms qualitatively and quantitatively. In addition, we propose an underwater image enhancement network (called Water-Net) trained on this benchmark as a baseline, which indicates the generalization of the proposed UIEB for training Convolutional Neural networks (CNNs). The benchmark evaluations and the proposed Water-Net demonstrate the performance and limitations of state-of-the-art algorithms, which shed light on future research in underwater image enhancement. The dataset and code are available at https://***/proj_***. Copyright © 2019, The Authors. All rights reserved.

关键词： Image enhancement

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Research on Loophole with Second Distribution of Real Value Detectors

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Chinese Journal of Electronics 2016年第6期25卷 1141-1150页

作者： WANG Tianbo ZHANG Fengbin XIA Chunhe Beijing Key Laboratory of Network Technology Beihang University Network and Information Security Laboratory Harbin University of Science and Technology

Traditional anomaly detection algorithm has improved to some degree the mechanism of negative selection. There still remain many problems such as the randomness of detector generation, incompleteness of selfset and the generalization ability of detectors, which would cause a lot of loopholes in non-self space. A heuristic algorithm based on the second distribution of real value detectors for the remains of loopholes of the non-self space in the first distribution and the mutation regions of self space is proposed. The algorithm can distribute real value detectors through omission data based on the methods of partition and movement. A method is proposed to solve the problem on how to get the optimal solutions to the parameters related in the algorithm. Theoretical analysis and experimental results prove the universality and effectiveness of the method. It is found that our algorithm can effectively avoid the generation of loopholes and thus reduce the omission rate of detector sets.

关键词： Artificial immune Anomaly detection Loophole Parameter estimation Detector

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A design of the common platform of wireless communication based on FPGA

A design of the common platform of wireless communication ba...

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2017 IEEE Conference on Energy Internet and Energy System Integration, EI2 2017

作者： Qiao, Lei Zheng, Zhe Cui, Wenpeng Zhang, Weilong Jiang, Xueping Research Department of Smart Chip Global Energy Interconnection Research Institute Beijing China State Grid Key Laboratory of Information and Network Security State Grid Laboratory of Electric Power Communication Network Technology Beijing China

ISBN: (纸本)9781538614273

We present a design of the common platform of wireless communication based on FPGA. The platform, developed by us, allows researchers to modify transport protocols on any layer of an OSI reference model, from physical layer to application one, thereby it is feasible to implement multiple wireless communication protocols on different layers. © 2017 IEEE.

关键词： Field programmable gate arrays (FPGA)

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security on a knapsack-type encryption scheme based upon hybrid-model assumption

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International Journal of network security 2017年第4期19卷 644-647页

作者： Jin, Zhengping Zhang, Hong Li, Zhongxian State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China National Computer Network Emergency Response Technical Team Coordination Center of China Beijing100029 China National Cybernet Security Limited Tianjin300384 China

Provable security is a reduction that breaking the scheme is usually reduced to solving some basic hard problems, thus the foundation of the scheme's security is the assumption that it is hard to solve the based problems. Due to most existing schemes are founded on single assumption, some encryption schemes, whose security are based on multiple assumptions, have been proposed. Recently, Su and Tsai constructed a knapsack-type encryption scheme based on hybrid-model, and proved it should be more secure than schemes based on single assumption. In this paper, we find that this scheme actually cannot reach the security as claimed. By launching the known message attack, we show Su and Tsai's encryption scheme cannot provide confidentiality, for the adversary could decrypt any ciphertext in this cryptosystem if one of the assumptions does not hold.

关键词： Cryptography

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Polarization attack on continuous-variable quantum key distribution

arXiv

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arXiv 2018年

作者： Zhao, Yijia Zhang, Yichen Huang, Yundi Xu, Bingjie Yu, Song Guo, Hong State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China Science and Technology on Security Communication Laboratory Institute of Southwestern Communication Chengdu610041 China State Key Laboratory of Advanced Optical Communication System and Network School of Electronics Engineering and Computer Science Center for Quantum Information Technology Peking University Beijing100871 China

The shot-noise unit (SNU) is a crucial factor for the practical security of a continuous-variable quantum key distribution system. In the most widely used experimental scheme, the SNU should be calibrated first and acts as a constant during the key distribution. However, the SNU of a practical system is dependent on the various parameters of the local oscillator, which can be controlled by the eavesdropper in the open channel. In this paper, we report a quantum hacking method to control the practical SNU by using the limited compensation rate of the polarization compensation. Since the compensation is only based on of the polarization measurement results of part of local oscillator pulses, the polarization of other unmeasured pulses may not be compensated correctly, which can be utilized by the eavesdropper to control the practical SNU. The simulation and experiment results indicate that the practical SNU can be controlled by the eavesdropper. Thus, the eavesdropper can use the fact that the practical SNU is no longer equals to the calibrated one to control the excess noise and final key rate. Copyright © 2018, The Authors. All rights reserved.

关键词： Shot noise

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Cubic medium field equation public key cryptosystem

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International Journal of network security 2018年第3期20卷 472-477页

作者： Lu, Gang Xue, Linyuan Nie, Xuyun Qin, Zhiguang Liu, Bo School of Information and Software Engineering University of Electronic Science and Technology of China 4 Jianshe North Rd 2nd Section Chenghua Qu Chengdu610054 China State Key Laboratory of Information Security Institute of Information Engineering Beijing100093 China Network and Data Security Key Laboratory of Sichuan Province Chengdu610054 China

Medium Field Equation (MFE) multivariate public key cryptosystems were broken by High Order Linearization Equation (HOLE) attack. In order to avoid HOLE attack, we proposed an improvement of MFE, Cubic MFE public key encryption scheme. In our construction, multiplications of three second order matrices were used to get a set of cubic polynomials in the central map. Through theoretical analysis and computer experiments, the Cubic MFE is shown to be secure against HOLE attack and other existing attacks. © International Journal of network security.

关键词： Linearization

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Angle-domain approach for parameter estimation in high-mobility OFDM with fully/partly calibrated massive ULA

arXiv

引用

arXiv 2018年

作者： Ge, Yinghao Zhang, Weile Gao, Feifei Minn, Hlaing MOE Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an Shaanxi710049 China State Key Laboratory of Intelligent Technology and Systems Tsinghua National Laboratory for Information Science and Technology Department of Automation Tsinghua University Beijing100084 China Department of Electrical Engineering University of Texas Dallas United States

In this paper, we consider a downlink orthogonal frequency division multiplexing (OFDM) system from a base station to a high-speed train (HST) equipped with fully/partly calibrated massive uniform linear antenna-array (ULA) in wireless environments with abundant scatterers. Multiple Doppler frequency offsets (DFOs) stemming from intensive propagation paths together with transceiver oscillator frequency offset (OFO) result in a fast time-varying frequency-selective channel. We develop an angle domain carrier frequency offset (CFO, general designation for DFO and OFO) estimation approach. A high-resolution beamforming network is designed to separate different DFOs into a set of parallel branches in angle domain such that each branch is mainly affected by a single dominant DFO. Then, a joint estimation algorithm for both maximum DFO and OFO is developed for fully calibrated ULA. Next, its estimation mean square error (MSE) performance is analyzed under inter-subarray mismatches. To mitigate the detrimental effects of inter-subarray mismatches, we introduce a calibration-oriented beamforming parameter (COBP) and develop the corresponding modified joint estimation algorithm for partly calibrated ULA. Moreover, the Cramér-Rao lower bound of CFO estimation is derived. Both theoretical and numerical results are provided to corroborate the proposed method. Copyright © 2018, The Authors. All rights reserved.

关键词： Calibration

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TPEFD： an SDN-based efficient elephant flow detection method

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网络与信息安全学报 2017年第5期3卷 70-76页

作者： TIAN YU LIU Jing LAI Ying-xu BAO Zhen-shan ZHANG Wen-bo Faculty of Information Technology Beijing University of Technology Beijing 100124 China Key Laboratory of Trusted Computing Beijing 100124 China Information Security Rank Protection Key Technology National Engineering Laboratory Beijing 100124 China)

Software-defined networking(SDN) is a new approach to configure and operate programmable switches of the networks(especially the data center networks) through a centralized software controller. Elephant flows normally exist in data center networks and take up a large amount of network bandwidth, so the elephant flow detection is very important to ease network congestion. A two-phase real-time detection(TPEFD) method was proposed to detect the elephant flows in the SDN-based network. First, the controller obtained aggregated statistics and shrank sample scope until it was small enough, packets were sampled in the scope in switches. In order to identify the elephant flows, the sFlow sampling results were compared with the dynamic threshold. If the sampling value exceeded the threshold value, the flow was recognized as an elephant flow. The efficiency of our method in an SDN experimental environment was evaluated. The experimental results indicated that the proposed method was feasible and the detection time was efficient.

关键词： OpenFlow 象现金流量流度检波数据中心

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Large branching tree based dynamic provable data possession scheme

Large branching tree based dynamic provable data possession ...

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作者： Li, Yong Yao, Ge Lei, Li-Nan Wang, Hua-Qun Lin, Chang-Lu School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China Fujian Provincial Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou350007 China Guangxi Key Laboratory of Cryptography and Information Security Guilin University of Electronic Technology Guilin541004 China School of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing210023 China

As the era of big data is coming, more and more users choose to store data in the cloud. Cloud storage provides users with flexible, dynamic and cost effective data storage service. However, the new paradigm of service introduces new security challenges such as users loss control of the remote data and they cannot ensure data integrity in the cloud. Moreover, supporting dynamic data updates is also a practical requirement of cloud storage. It is imperative to provide an efficient and secure dynamic auditing protocol to check the data integrity in the cloud. In this paper, we first analyze the dynamic performance of some prior works. In order to solve the inefficiency problem caused by the Merkle Hash Tree (MHT) in dynamic update, the Large Branching Tree (LBT) data structure was introduced in our Dynamic Provable Data Possession (DPDP) scheme. LBT structure simplifies the process of updates and supports updating several blocks synchronously, and reduces the auxiliary information during the challenge-respond process as well. Our scheme is able to efficiently support fully dynamic data updates and batch updates. Based on the LBT structure, we use bilinear algebraic maps to optimize the authenticate process. A signature scheme is used to authenticate both the value and the position of data blocks, which reduces computation overhead during the dynamic update phase. The security and performance analysis show that our DPDP scheme is provably secure and efficient. © 2017 Institute of Information Science. All rights reserved.

关键词： Cloud storage

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