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arXiv 2017年

作者： Zhao, Yijia Zhang, Yichen Xu, Bingjie Yu, Song Guo, Hong State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 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 Science and Technology on Security Communication Laboratory Institute of Southwestern Communication Chengdu610041 China

The method of improving the performance of continuous-variable quantum key distribution protocols by post-selection has been recently proposed and verified. In continuous-variable measurement-device-independent quantum key distribution (CV-MDI QKD) protocols, the measurement results are obtained from untrusted third party Charlie. There is still not an effective method of improving CV-MDI QKD by the post-selection with untrusted measurement. We propose a method to improve the performance of coherent-state CV-MDI QKD protocol by virtual photon subtraction via non-Gaussian post-selection. The non-Gaussian post-selection of transmitted data is equivalent to an ideal photon subtraction on the two-mode squeezed vacuum state, which is favorable to enhance the performance of CV-MDI QKD. In CV-MDI QKD protocol with non-Gaussian post-selection, two users select their own data independently. We demonstrate that the optimal performance of the renovated CV-MDI QKD protocol is obtained with the transmitted data only selected by Alice. By setting appropriate parameters of the virtual photon subtraction, the secret key rate and tolerable excess noise are both improved at long transmission distance. The method provides an effective optimization scheme for the application of CV-MDI QKD protocols. Copyright © 2017, The Authors. All rights reserved.

关键词： Quantum cryptography

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Improved multiparty quantum key agreement in travelling mode

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science China(Physics,Mechanics & Astronomy) 2016年第12期59卷 12-21页

作者： Wei Huang Qi Su BingJie Xu Bin Liu Fan Fan HengYue Jia YingHui Yang Science and Technology on Communication Security Laboratory Chengdu 610041China State Key Laboratory of Cryptology Beijing 100878China College of Computer Science Chongqing UniversityChongqing 400044China School of Information Central University of Finance and EconomicsBeijing 100081China School of Mathematics and Information Science Henan Polytechnic UniversityJiaozuo 454000China

The need to simultaneously balance security and fairness in quantum key agreement(QKA) makes it challenging to design a flawless QKA protocol, especially a multiparty quantum key agreement(MQKA) protocol. When designing an MQKA protocol,two modes can be used to transmit the quantum information carriers: travelling mode and distributed mode. MQKA protocols usually have a higher qubit efficiency in travelling mode than in distributed mode. Thus, several travelling mode MQKA protocols have been proposed. However, almost all of these are vulnerable to collusion attacks from internal betrayers. This paper proposes an improved MQKA protocol that operates in travelling mode with Einstein-Podolsky-Rosen pairs. More importantly, we present a new travelling mode MQKA protocol that uses single photons, which is more feasible than previous methods under current technologies.

关键词： quantum cryptography multiparty quantum key agreement travelling mode cryptanalysis and improvement

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Reactive/proactive connectivity management in a tactical service-oriented infrastructure

Reactive/proactive connectivity management in a tactical ser...

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International Conference on Military communications and information Systems (ICMCIS)

作者： Roberto Rigolin F. Lopes Mikko Nieminen Antti Viidanoja Stephen D. Wolthusen Norwegian Information Security Laboratory Norwegian University of Science and Technology Gjovik Norway Communication Systems Fraunhofer FKIE Bonn Germany Patria Systems Tampere Finland School of Mathematics and Information Security Royal Holloway University of London Surrey UK

ISBN: (纸本)9781538638590

This paper introduces a model to represent the information systems using a tactical service-oriented infrastructure (TSI) together with the orchestrations of core services providing the reactive/proactive connectivity mechanisms within TSIs in/out chains. The model was instantiated with services realizing an algorithm behaving differently under stable or unstable network conditions. A quantitative analysis was performed over simulated results from a network using ns-3 and OLSRv2 with nodes organized in three mobility patterns: random, group and grid. The results suggest that connectivity graph metrics such as link changes, link duration and path availability can be used to trigger a cross-layer and service-oriented mechanism.

关键词： Wireless LAN Quality of service Mobile communication Reliability information systems Context Labeling

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Individual communication Transmitter Identification Using Correntropy-based Collaborative Representation

Individual Communication Transmitter Identification Using Co...

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International Congress on Image and Signal Processing, BioMedical Engineering and Informatics

作者： Ying-Ke Lei Science and Technology on Communication Information Security Control Laboratory

ISBN: (纸本)9781509037117

In this paper, an efficient radio transmitter identification method is proposed for identifying radio transmitters. The square integral bispectra (SIB) transformation is firstly utilized to extract the features from the raw signal data of radio transmitters, which recasts the problem of communication transmitter identification into the form of measuring similarity between points in its metric space. Then we use the collaborative representation framework as a platform to develop a novel classification model, correntropy-based collaborative representation classifier (CECRC), for identifying different radio transmitters according to the similarity between the points in the SIB feature space. Extensive experimental results on real-world data sets demonstrate the effectiveness of our proposed method.

关键词： active algorithm individual communication transmitter identification correntropy collaborative representation

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High speed continuous variable source-independent quantum random number generation

arXiv

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arXiv 2017年

作者： Xu, Bingjie Chen, Ziyang Li, Zhengyu Yang, Jie Su, Qi Huang, Wei Zhang, Yichen Guo, Hong Science and Technology on Security Communication Laboratory Institute of Southwestern Communication Chengdu610041 China State Key Laboratory of Cryptography Beijing100878 China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Center for Quantum Information Technology Peking University Beijing100871 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

As a fundamental phenomenon in nature, randomness has a wide range of applications in the fields of science and engineering. Among different types of randomnumber generators (RNG), quantumrandomnumber generator (QRNG) is a kind of promising RNG as it can provide provable true randomnumbers based on the inherent randomness of fundamental quantum processes. Nevertheless, the randomness from a QRNG can be diminished (or even destroyed) if the devices (especially the entropy source devices) are not perfect or ill-characterized. To eliminate the practical security loopholes from the source, sourceindependentQRNGs, which allow the source to have arbitrary and unknown dimensions, have been introduced and become one of the most important semi-device-independent QRNGs. Herein a method that enables ultra-fast unpredictable quantum random number generation from quadrature fluctuations of quantum optical field without any assumptions on the input states is proposed. Particularly, to estimate a lower bound on the extractable randomness that is independent from side information held by an eavesdropper, a new security analysis framework is established based on the extremality of Gaussian states, which can be easily extended to design and analyze new semi-device-independent continuous variable QRNG protocols. Moreover, the practical imperfections of the QRNG including the effects of excess noise, finite sampling range, finite resolution and asymmetric conjugate quadratures are taken into account and quantitatively analyzed. Finally, the proposed method is experimentally demonstrated to obtain high secure randomnumber generation rates of 15.07Gbits/s in off-line configuration and can potentially achieve 6 Gbits/s by real-time post-processing. Copyright © 2017, arXiv, All rights reserved.

关键词： Random processes

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Multiway Dynamic Trust Chain Model on Virtual Machine for Cloud Computing

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China communications 2016年第7期13卷 83-91页

作者： Jie Zhu Guoyuan Lin Fucheng You Huaqun Liu Chunru Zhou School of Computer Science and Technology China University of Mining&TechnologyXuzhou 221116China State Key Laboratory for Novel Software Technology hosted at Nanjing University Nanjing 210093China Information Engineering School of Beijing Institute of Graphic Communication Beijing 102600China Beijing Key Laboratory of Signal and Information Processing for High-end Printing Equipment Beijing Institute of Graphic CommunicationBeijing 100026China Information Security Center Beijing University of Posts and TelecommunicationsBeijing 100876China Nanjing University of Information Science&Technology Nanjing 210044China

This paper sums up four security factors after analyzing co-residency threats caused by the special multitenant environment in the *** secure the factors,a multiway dynamic trust chain transfer model was proposed on the basis of a measurement interactive virtual machine and current behavior to protect the integrity of the system.A trust chain construction module is designed in a virtual machine *** dynamic monitoring,it achieves the purpose of transferring integrity between virtual machine.A cloud system with a trust authentication function is implemented on the basis of the model,and its practicability is shown.

关键词： cloud computing virtual machine trustworthiness measurement dynamic trust transfer

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Efficient rate-adaptive reconciliation for continuous-variable quantum key distribution

arXiv

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arXiv 2017年

作者： Wang, Xiangyu Zhang, Yichen Yu, Song Bingjie, X.U. Li, Zhengyu Guo, Hong State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications No. 10 Xitucheng Road Beijing100876 China Science and Technology on Communication Security Laboratory Institute of Southwestern Communication No. 6 Chuangye Road Chengdu610041 China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Center for Quantum Information Technology Center for Computational Science and Engineering Peking University No. 5 Yiheyuan Road Beijing100871 China

information reconciliation protocol has a significant effect on the secret key rate and maximal transmission distance of continuous-variable quantum key distribution (CV-QKD) systems. We propose an efficient rate-adaptive reconciliation protocol suitable for practical CV-QKD systems with time-varying quantum channel. This protocol changes the code rate of multi-edge type low density parity check codes, by puncturing (increasing the code rate) and shortening (decreasing the code rate) techniques, to enlarge the correctable signal-to-noise ratios regime, thus improves the overall reconciliation efficiency comparing to the original fixed rate reconciliation protocol. We verify our rate-adaptive reconciliation protocol with three typical code rate, i.e., 0.1, 0.05 and 0.02, the reconciliation efficiency keep around 93.5%, 95.4% and 96.4% for different signal-to-noise ratios, which shows the potential of implementing high-performance CV-QKD systems using single code rate matrix. Copyright © 2017, The Authors. All rights reserved.

关键词： Efficiency

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A Method of Individual Radio Transmitter Identification Based on Collaborative Representation

A Method of Individual Radio Transmitter Identification Base...

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2016 IEEE information technology,Networking,Electronic and Automation control Conference(ITNEC 2016)

作者： Zhe Tang Ying-Ke Lei Electronic Engineering Institute Science and Technology on Communication Information Security Control Laboratory

ISBN: (纸本)9781467391955

To make use of the correlation among the samples, a method of individual radio transmitter identification based on collaborative representation is put forward in this paper. Firstly, we extract the square integral bispectra(SIB)features to characterise the radio transmitters in the feature space. Secondly, based on collaborative representation, we compute the sparse coefficients with low computational complexity. At last, benefiting from the discrimination information of coefficient, the classifier is constructed for the final individual radio transmitter identification. On the actual collected FM radio dataset, the experimental results verify the effectiveness and robustness of our method.

关键词： individual radio transmitter identification collaborative representation sparse representation square integral bispectra

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Angle-domain doppler pre-compensation for high-mobility OFDM uplink with a massive ULA

arXiv

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arXiv 2017年

作者： Guo, Wei Zhang, Weile Mu, Pengcheng Gao, Feifei Yao, Bobin MOE Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an China Tsinghua National Laboratory for Information Science and Technology Beijing China School of Electronic and Control Engineering Chang'an University Xi'an China

In this paper, we propose a Doppler pre-compensation scheme for high-mobility orthogonal frequency division multiplexing (OFDM) uplink, where a high-speed terminal transmits signals to the base station (BS). Considering that the time-varying multipath channel consists of multiple Doppler frequency offsets (DFOs) with different angle of departures (AoDs), we propose to perform DFO pre-compensation at the transmitter with a large-scale uniform linear array (ULA). The transmitted signal passes through a beamforming network with high-spatial resolution to produce multiple parallel branches. Each branch transmits signal towards one direction thus it is affected by one dominant DFO when passing over the time-varying channel. Therefore, we can compensate the DFO for each branch at the transmitter previously. Theoretical analysis for the Doppler spread of the equivalent uplink channel is also conducted. It is found that when the number of transmit antennas is sufficiently large, the time-variation of channel can be efficiently suppressed. Therefore, the performance will not degrade significantly if applying the conventional time-invariant channel estimation and equalization methods at the receiver. Simulation results are provided to verify the proposed scheme. Copyright © 2017, The Authors. All rights reserved.

关键词： Frequency allocation

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An error-tolerant keyword search scheme based on public-key encryption in secure cloud computing

An error-tolerant keyword search scheme based on public-key ...

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作者： Bo, Yang Zhang, Mingwu Du, Jun-Qiang School of Computer Science Shaanxi Normal University Xi'an710119 China Science and Technology on Communication Security Laboratory Chengdu610041 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing100093 China School of Computer Sciences Hubei University of Technology Wuhan430068 China

An error-tolerant keyword search scheme permits to make searches on encrypted data with only an approximation of some keyword. The scheme is suitable to the case where users' searching input might not exactly match those pre-set keywords. An error-tolerant keyword search scheme can be generated based on a public-key encryption scheme, in which anyone with access to a user's public key can generate the trapdoors and indexes to keywords, and only the user holding the decryption key can obtain the records it retrieves. In this paper, we first present a general framework for searching on error-tolerant keywords based on a public-key encryption scheme. Then, we propose a concrete scheme based on the Cramer-Shoup cryptosystem. The scheme is adaptive chosen-ciphertext attack secure and suitable for all similarity metrics including Hamming distance metric, edit distance metric, and set difference metric. It does not require the user to construct and store anything in advance, other than the cryptosystem used to calculate the trapdoor of keywords and to encrypt data documents. Thus, our scheme tremendously eases the users' burden. What is more, our scheme is able to transform the servers' searching for error-tolerant keywords on ciphertexts to searching for exact keywords on plaintexts. The server can use any existing approaches of exact keywords search to search plaintexts on an index table. Copyright © 2015 John Wiley & Sons, Ltd.

关键词： Hamming distance

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