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A Sensor-Service Collaboration Approach for Target Tracking in Wireless Camera Networks

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china Communications 2017年第7期14卷 44-56页

作者： Shuai Zhao Le Yu state key Laboratory of {2. and switching technology Beijing University of Posts and Telecommunications china Mobile information {2. center

Mobile target tracking is a necessary function of some emerging application domains, such as virtual reality, smart home and intelligent healthcare. However, existing portable devices for target tracking are resource intensive and high-cost. Camera tracking is an effective location tracking way for those emerging applications which can reuse the existing ubiquitous video monitoring system. This paper proposes a dynamic community-based camera collaboration(D3C) framework for target location and tracking. The contributions of D3C mainly include that(1) nonlinear perspective projection model is selected as the camera sensing model and sequential Monte Carlo is employed to predict the target location;(2. a dynamic collaboration scheme is proposed, it is based on the local community-detection theory deriving from social network analysis. The performance of proposed approach is validated by both synthetic datasets and real-world application. The experiment results show that D3C meets the versatility, real-time and fault tolerance requirements of target tracking applications.

关键词： service collaboration camera tracking community detection sequential monte carlo

Conjugate adjoining problem in braid groups and new design of braid-based signatures

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Science china(information Sciences) 2010年第3期53卷 524-536页

作者： wang licheng1,2, wang liHua2, CAO ZhenFu3, yang yixian1 & NIU XinXin1 information security center, state key Laboratory of networking and switching technology, beijing university of posts and telecommunications, beijing 100876, china 2National Institute of information and Communications technology, Tokyo 184-8795, Japan 3Trusted Digital technology Laboratory, Shanghai Jiao Tong university, Shanghai 200240, china 1. information security {2. State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China2. National Institute of Information and Communications Technology Tokyo 184-8795 Japan3. Trusted Digital Technology Laboratory Shanghai Jiao Tong University Shanghai 200240 China

The development of quantum computation casts serious threats to the securities of most existing public-key cryptosystems. Braid-based cryptography is one of the alternatives that have potential advantages in resisting quantum attacks. In this paper, the {2. of the art of braid cryptography is surveyed, and then a new cryptographic problem-conjugate adjoining problem related to braid groups is proposed. Based on this problem, we design a new braid-based signature scheme. This scheme is efficient and provably secure in the random oracle model. Further, we present the comparison between braid-based signatures and RSA-based ones. The signing process of the braid-based schemes is more efficient than that of RSA-based ones, while the verifying process of the braid-based ones is observably slow. Hence, braid-based signatures are suitable for scenarios where the signing process has to be as quick as possible but delays are permitted in the verifying process, for example, in off-line e-cash systems. The key sizes in braid-based schemes are considerably large-about 2. bits in the case of secret keys and 12. bits in the case of public keys. However, braid operations are much simpler and more efficient than modular exponential operations. Therefore, braid-based schemes can be embedded into devices with low computational ability and large memory space. The capability of braid cryptosystems to resist currently known quantum attacks is also discussed from the perspective of hidden subgroup problems.

关键词： braid group conjugate adjoining problem digital signature provable security resistance to quantum attack

The Research on Cryptographic Schemes

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ZTE Communications 2007年第4期5卷 1-5页

作者： Zheng Shihui (information security {2. of state key Laboratory of networking and switching technology, beijing university of posts and telecommunications, beijing 100876, china)

Cryptography is an important technology for information {2.. It mainly includes symmetric and asymmetric cryptographic algorithms and protocols. For the symmetric cryptographic algorithms, it is easy to deduce decryption keys from the encryption keys and vice versa. Because this algorithm encrypts and decrypts data very quickly, it is applicable in situations where large numbers of data have to be protected. However, for the asymmetric algorithm, extracting the secret key from the public key is computationally infeasible. Although the performance speed of the asymmetric algorithm is much slower than that of the symmetric algorithm, the asymmetric algorithm has key distribution and management advantages over the symmetric one. Moreover, it is a perfect digital signature scheme.

关键词： Hash The Research on Cryptographic Schemes

Secure Beamforming Design for SWIPT in Cooperative D2. Communications

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china Communications 2017年第1期14卷 20-33页

作者： li Jiang Cheng qin Xixi Zhang Hui Tian state key Laboratory of {2. and switching technology Beijing University of Posts and Telecommunicationsand Science and Technology on Information Transmission and Dissemination in Communication Networks LaboratoryBeijing100876China

In device-to-device(D2.) communications, device terminal relaying makes it possible for devices in a network to function as transmission relays for each other to enhance the spectral efficiency. In this paper we consider a cooperative D2. communication system with simultaneous wireless information and power transfer(SWIPT). The cooperative D2. communication scheme allows two nearby devices to communicate with each other in the licensed cellular bandwidth by assigning D2. transmitters as half-duplex(HD) relay to assists cellular downlink transmissions. In particular, we focus on secure information transmission for the cellular users when the idle D2. users are the potential eavesdroppers. We aim to design secure beamforming schemes to maximize the D2. users data rate while guaranteeing the secrecy rate requirements of the cellular users and the minimum required amounts of power transferred to the idle D2. users. To solve this non-convex problem, a semi-definite programming relaxation(SDR) approach is adopted to obtain the optimal solution. Furthermore, we propose two suboptimal secure beamforming schemes with low computational complexity for providing secure communication and efficient energy transfer. Simulation results demonstrate the superiority of our proposed scheme.

关键词： device-to-device(D2.) communications half-duplex relaying physical layer security secure beamforming simultaneous wireless information and power transfer

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密码学原语中信任传递语义研究

通信学报 2008年第12期29卷 60-65页

作者：王励成潘耘谷利泽杨义先北京邮电大学网络与交换技术国家重点实验室信息安全中心中国传媒大学计算机学院

以可信计算和信任管理为背景,考察密码学原语中所包含的信任传递语义,进而借助于目前较为成熟的密码学理论为信任传递机理进行建模,提出了信任传递语义模型的雏形,分析了多种典型数字签名原语中的信任传递语义。分析结果表明所提模型具... 详细信息

以可信计算和信任管理为背景,考察密码学原语中所包含的信任传递语义,进而借助于目前较为成熟的密码学理论为信任传递机理进行建模,提出了信任传递语义模型的雏形,分析了多种典型数字签名原语中的信任传递语义。分析结果表明所提模型具有很强的概括能力。最后,展望了该模型在IP网络信任管理系统设计及分析中的潜在应用。

关键词：密码学原语信任传递语义

A novel quantum information hiding protocol based on entanglement swapping of high-level Bell states

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Chinese Physics B 2015年第5期24卷 231-238页

作者：徐淑奖陈秀波王连海钮心忻杨义先 Shandong Provincial key Laboratory of Computer Networks Shandong Computer Science Center (National Supercomputer Center in Jinan) information security {2. State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications state key Laboratory of {2. security Institute of Information Engineering Chinese Academy of Sciences

Using entanglement swapping of high-level Bell states, we first derive a covert layer between the secret message and the possible output results of the entanglement swapping between any two generalized Bell states, and then propose a novel high-efficiency quantum information hiding protocol based on the covert layer. In the proposed scheme, a covert channel can be built up under the cover of a high-level quantum secure direct communication （QSDC） channel for securely transmitting secret messages without consuming any auxiliary quantum state or any extra communication resource. It is shown that this protocol not only has a high embedding efficiency but also achieves a good imperceptibility as well as a high security.

关键词： quantum information hiding quantum covert'channel entanglement swapping high-level Bell states

Construction of Convolutional Network Coding for Cyclic Multicast Networks

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Construction of Convolutional Network Coding for Cyclic Mult...

基于DWT和视觉加权的图像质量评价方法研究

2.10 IEEE 2.d Symposium on Web Society

作者： qin guo~(1,2.3),mingxing luo~(1,2.3),{2.(1,2.3),licheng wang~(1,2.3),yixian yang~(1,2.3) 1 information security center,state key Laboratory of networking and {12. technology, beijing university of posts and telecommunications,beijing 100876,china 2.key Laboratory of Network and information Attack and Defence technology of MOE, beijing university of posts and telecommunications,beijing 100876,china 3 National Engineering Laboratory for Disaster Backup and Recovery, beijing university of posts and telecommunications,beijing 100876,china.

＜正＞In this paper,we present a practical algorithm to construct the convolutional multicast network coding over any finite directed cyclic *** dual line graph of a directed cyclic graph is considered as a *** regarding the global encoding kernels in the original graph as the corresponding inputs or outputs of some subsystem and the local encoding kernels in original graph as gains of channels,we can construct the convolutional network code through randomly choosing the local encoding kernels of the directed cycles in *** using Mason formula,the construction becomes very efficient.

关键词： Convolutional network code convolutional multicast dual line graph Mason formula

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通信学报 2011年第9期32卷 129-136页

作者：蒋铭马兆丰辛宇钮心忻杨义先北京邮电大学网络与交换技术国家重点实验室信息安全中心北京邮电大学网络与信息攻防技术教育部重点实验室天柏宽带网络科技(北京)有限公司

提出了一种新的基于小波变换和视觉加权的图像质量客观评价方法(WVWPSNR,wavelet and vision weighted peak signal noise ratio)。该方法将图像的DWT和HVS特性相结合,利用子图分解以及视觉加权处理实现图像质量的客观评价。对多幅分别... 详细信息

提出了一种新的基于小波变换和视觉加权的图像质量客观评价方法(WVWPSNR,wavelet and vision weighted peak signal noise ratio)。该方法将图像的DWT和HVS特性相结合,利用子图分解以及视觉加权处理实现图像质量的客观评价。对多幅分别经过JPEG压缩、JPEG2.00压缩、White Noise(白噪声)、Gaussian Blur(高斯模糊)、FastFading降质的图像进行测试,实验结果表明该方法可靠、有效,与主观评价结果更接近。尤其是该方法对JPEG压缩图像的质量评价性能较好。

关键词：图像质量评价小波变换人类视觉系统主观评价数字水印

DRDoS Threat Analysis Based on Magnification Factor and Diffusion Factor

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DRDoS Threat Analysis Based on Magnification Factor and Diff...