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DOAS: Efficient data owner authorized search over encrypted cloud data

Peer-to-Peer Networking and Applications 2016年第3期11卷 349-360页

作者： Miao, Yinbin Ma, Jianfeng Liu, Ximeng Liu, Zhiquan Zhang, Junwei Wei, Fushan School of Telecommunication Engineering Xidian University Xi’an China School of Computer Science and Technology School of Cyber Engineering Xidian University Xi’an China School of Information Systems Singapore Management University Singapore Singapore State Key Laboratory of Mathematical Engineering and Advanced Computing The PLA Information Engineering University Zhengzhou China

Data outsourcing service can shift the local data storage and maintenance to cloud service provider (CSP) to ease the burden from data owner, but it brings the data security threats as CSP is always considered to honest-but-curious. Therefore, searchable encryption (SE) technique which allows cloud clients (including data owner and data user) to securely search over ciphertext through keywords and selectively retrieve files of interest is of prime importance. However, in practice, data user’s access permission always dynamically varies with data owner’s preferences. Moreover, existing SE schemes which are based on attribute-based encryption (ABE) incur heavy computational burden through attribution revocation and policy updating. To allow data owner to flexibly grant access permissions, we design a secure cryptographic primitive called as efficient data owner authorized search over encrypted data scheme through utilizing identity-based encryption (IBE) technique. The formal security analysis proves that our scheme is secure against chosen-plaintext attack (CPA) and chosen-keyword attack (CKA) without random oracle. Besides, empirical experiments over real-world dataset show that our scheme is efficient and feasible with regard to data access control.

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Attack on an ID-based authenticated group key exchange protocol with identifying malicious participants

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International Journal of Network Security 2016年第2期18卷 393-396页

作者： Wei, Fushan Wei, Yun Ma, Chuangui School of Computer Science and Technology Xidian University No. 2 South Taibai Road Xian Shanxi710071 China State Key Laboratory of Mathematical Engineering and Advanced Computing No. 92 Kexue Road Zhengzhou Henan450001 China

An authenticated group key exchange (AGKE) protocol allows a group of participants to establish a common session key and then provides secure group communications in collaborative and distributed applications. Recently, Wu et al. proposed an ID-based authenticated group key exchange protocol based on bilinear pairings. They claimed that their protocol can detect and identify the malicious participants, which means it not only can check whether malicious participants exist in the protocol or not, but also can find out who the malicious participants are. However, their protocol is not as secure as claimed. In this letter, we show that Wu et al.'s protocol is insecure against an insider colluding attack. Two malicious participants can collude to impersonate several honest participants to the rest participants in the group. In addition, we also figure out what has gone wrong with Wu et al.'s protocol and how to fix it.

关键词： Public key cryptography

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Performance Analysis of GPU-Based Convolutional Neural Networks

Performance Analysis of GPU-Based Convolutional Neural Netwo...

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International Conference on Parallel Processing (ICPP)

作者： Xiaqing Li Guangyan Zhang H. Howie Huang Zhufan Wang Weimin Zheng Tsinghua National Laboratory for Information Science and Technology State Key Lab of Mathematical Engineering and Advanced Computing Wuxi China Department of Computer Science and Technology Tsinghua University Department of Electrical and Computer Engineering George Washington University

ISBN: (纸本)9781509028245

As one of the most important deep learning models, convolutional neural networks (CNNs) have achieved great successes in a number of applications such as image classification, speech recognition and nature language understanding. Training CNNs on large data sets is computationally expensive, leading to a flurry of research and development of open-source parallel implementations on GPUs. However, few studies have been performed to evaluate the performance characteristics of those implementations. In this paper, we conduct a comprehensive comparison of these implementations over a wide range of parameter configurations, investigate potential performance bottlenecks and point out a number of opportunities for further optimization.

关键词： Convolution Graphics processing units Runtime Training Computational modeling Computer architecture Kernel

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Proton Shell Evolution below Sn132: First Measurement of Low-Lying β-Emitting Isomers in Ag123,125

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Physical Review Letters 2019年第21期122卷 212502-212502页

作者： Z. Q. Chen Z. H. Li H. Hua H. Watanabe C. X. Yuan S. Q. Zhang G. Lorusso S. Nishimura H. Baba F. Browne G. Benzoni K. Y. Chae F. C. L. Crespi P. Doornenbal N. Fukuda G. Gey R. Gernhäuser N. Inabe T. Isobe D. X. Jiang A. Jungclaus H. S. Jung Y. Jin D. Kameda G. D. Kim Y. K. Kim I. Kojouharov F. G. Kondev T. Kubo N. Kurz Y. K. Kwon X. Q. Li J. L. Lou G. J. Lane C. G. Li D. W. Luo A. Montaner-Pizá K. Moschner C. Y. Niu F. Naqvi M. Niikura H. Nishibata A. Odahara R. Orlandi Z. Patel Zs. Podolyák T. Sumikama P.-A. Söderström H. Sakurai H. Schaffner G. S. Simpson K. Steiger H. Suzuki J. Taprogge H. Takeda Zs. Vajta H. K. Wang J. Wu A. Wendt C. G. Wang H. Y. Wu X. Wang C. G. Wu C. Xu Z. Y. Xu A. Yagi Y. L. Ye K. Yoshinaga School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China IRCNPC School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Zhuhai 519082 Guangdong China National Physical Laboratory NPL Teddington Middlesex TW11 0LW United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom INFN Sezione di Milano via Celoria 16 I-20133 Milano Italy Department of Physics Sungkyunkwan University Suwon 440-746 Republic of Korea Dipartimento di Fisica Universitá di Milano via Celoria 16 I-20133 Milano Italy LPSC Universite Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Physik Department Technische Universität München D-85748 Garching Germany Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Department of Physics University of Notre Dame Notre Dame Indiana 46556 USA Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany Physics Division Argonne National Laboratory Lemont Illinois 60439 USA Department of Nuclear Physics R.S.P.E. Australian National University Canberra Australian Capital Territory 0200 Australia IFIC CSIC-Universidad de Valencia A.C. 22085 E 46071 Valencia Spain Institut für Kernphysik Universität zu Köln Zülpicher Strasse 77 D-50937 Köln Germany Wright Nuclear Structu

The β-delayed γ-ray spectroscopy of neutron-rich Ag123,125 isotopes is investigated at the Radioactive Isotope Beam Factory of RIKEN, and the long-predicted 1/2− β-emitting isomers in Ag123,125 are identified for the first time. With the new experimental results, the systematic trend of energy spacing between the lowest 9/2+ and 1/2− levels is extended in Ag isotopes up to N=78, providing a clear signal for the reduction of the Z=40 subshell gap in Ag towards N=82. Shell-model calculations with the state-of-the-art VMU plus M3Y spin-orbit interaction give a satisfactory description of the low-lying states in Ag123,125. The tensor force is found to play a crucial role in the evolution of the size of the Z=40 subshell gap. The observed inversion of the single-particle levels around Ag123 can be well interpreted in terms of the monopole shift of the π1g9/2 orbitals mainly caused by the increasing occupation of ν1h11/2 orbitals.

关键词： Beta decay Shell model 90 ≤ A ≤ 149 Nuclear structure & decays Radioactive beams

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GCORE: A Gravitation-Based Approach for Chinese Open Relation

GCORE: A Gravitation-Based Approach for Chinese Open Relatio...

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International Conference on Computer Science and Mechanical Automation, CSMA 2015

作者： Wang, Yue Zhou, Gang Tian, Fei Nan, Yu Ma, Jiangtao Information and Engineering University State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China Information and Engineering University Zhengzhou China

ISBN: (纸本)9781467391658

Traditional Relation Extraction (RE) trains individual extractors for pre-defined relations. Open Relation Extraction (ORE) can eschew domain-specific training data, tackle an unbounded number of relations, and scale up to massive and heterogeneous corpus such as the web. However, It is difficult to process micro log texts: the genre is noisy, utterances are very short, and texts have little context. As such, conventional RE approaches fail when faced with micro log and other Web texts. In this paper, we present a gravitation-based Chinese ORE approach to extracting relations between entities by using the idea of the law of universal gravitation. GCORE produces heuristic rules to extract entity relations, and calculates a confidence score for each relational tuple, which is directly proportional to the product of the frequency of entity pairs and the frequency of relation words, and inversely proportional to the square of the distance between the relation word and the candidate entity pair. The confidence score can be used to show the reliability of relational tuples. The higher the score, the more reliable the candidate tuple is, and vice versa. The experimental evaluation over two data sets from ZORE demonstrates the correctness and effectiveness of our proposed approach, and empirical results on Weibo texts show the universality of GCORE. © 2015 IEEE.

关键词： Gravitation

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Coexistence of ferromagnetic and stripe-type antiferromagnetic spin fluctuations in YFe2Ge2

arXiv

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arXiv 2018年

作者： Wo, Hongliang Wang, Qisi Shen, Yao Zhang, Xiaowen Hao, Yiqing Feng, Yu Shen, Shoudong He, Zheng Pan, Bingying Wang, Wenbin Nakajima, K. Ohira-Kawamura, S. Steffens, P. Boehm, M. Schmalzl, K. Forrest, T.R. Matsuda, M. Zhao, Yang Lynn, J.W. Yin, Zhiping Zhao, Jun State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200433 China Institute of Nanoelectronic Devices and Quantum Computing Fudan University Shanghai200433 China Materials and Life Science Division J-PARC Center Tokai Ibaraki319-1195 Japan Institut Laue-Langevin 71 Avenue des Martyrs Grenoble Cedex 938042 France Forschungszentrum Jülich GmbH Jülich Centre for Neutron Science at ILL 71 Avenue des Martyrs Grenoble38000 France Diamond Light Source Harwell Campus DidcotOX11 0DE United Kingdom Neutron Scattering Division Oak Ridge National Laboratory Oak RidgeTN37831 United States NIST Center for Neutron Research National Institute of Standards and Technology GaithersburgMD20899 United States Department of Materials Science and Engineering University of Maryland College ParkMD20742 United States Department of Physics and Center for Advanced Quantum Studies Beijing Normal University Beijing100875 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

We report neutron scattering measurements of single-crystalline YFe2Ge2 in the normal state, which has the same crystal structure to the 122 family of iron pnictide superconductors. YFe2Ge2 does not exhibit long range magnetic order, but exhibits strong spin fluctuations. Like the iron pnictides, YFe2Ge2 displays anisotropic stripe-type antiferromagnetic spin fluctuations at (π, 0, π). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wavevector (0, 0, π). These ferromagnetic spin fluctuations are isotropic in the (H, K) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFe2Ge2 and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials. Copyright © 2018, The Authors. All rights reserved.

关键词： Crystal structure

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Stochastic network calculus based delay analysis for window flow controller

Stochastic network calculus based delay analysis for window ...

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2014 International Conference on Information Technology and Application, ITA2014

作者： Li, Baoliang Dou, Wenhua Zhao, Jie National University of Defense Technology Changsha China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781138026773

In the network with flow control, the output usually feedbacks some information to the input, controlling the data transmission and preventing buffer overflow. Flow control transforms the traditional forward networks into feedback networks, and the correlation between arrival and departure processes makes the performance modeling and analysis rather complex and difficult. In this paper, we take up the challenge by applying the theory of Stochastic Network Calculus (SNC) to characterize the feedback nature of static Window Flow Controller (WFC), and provide a probability end-to-end delay bound for network traffic regulated by WFC. We derive the delay bound based on the virtual-backlogcentric stochastic arrival curve and virtual-backlog stochastic strict service curve. As far as we know, it is the first time to model and analyze the WFC with the theory of SNC, which is of great value to both the guarantee of network Quality-of-Service (QoS) and the development of SNC theory. Finally, the influence of offered load on the end-to-end delay bounds is also discussed. © 2015 Taylor & Francis Group, London.

关键词： Flow control

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mOT+: An efficient and secure identity-based diffie-hellman protocol over RSA group 6th

mOT+: An efficient and secure identity-based diffie-hellman ...

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6th International Conference on Trusted Systems, INTRUST 2014

作者： Tian, Baoping Wei, Fushan Ma, Chuangui State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Zhengzhou450001 China

ISBN: (纸本)9783319279978

In 2010, Rosario Gennaro et al. revisited the old and elegant Okamoto-Tanaka scheme and presented a variant of it called mOT. How-ever the compromise of ephemeral private key will lead to the leakage of the session key and the user’s static private key. In this paper, we propose an improved version of mOT(denoted as mOT+). Moreover, based on RSA assumption and CDH assumption we provide a tight and intuitive security reduction in the id-eCK model. Without any extra computa-tional cost, mOT+ achieves security in the id-eCK model, and further-more it also meets full perfect forward secrecy against active adversary. © Springer International Publishing Switzerland 2015.

关键词： Public key cryptography

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Noise subtraction from KAGRA O3GK data using Independent Component Analysis

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Classical and Quantum Gravity 2023年第8期40卷 085015-085015页

作者： H Abe T Akutsu M Ando A Araya N Aritomi H Asada Y Aso S Bae Y Bae R Bajpai K Cannon Z Cao E Capocasa M Chan C Chen D Chen K Chen Y Chen C-Y Chiang Y-K Chu S Eguchi M Eisenmann Y Enomoto R Flaminio H K Fong Y Fujii Y Fujikawa Y Fujimoto I Fukunaga D Gao G-G Ge S Ha I P W Hadiputrawan S Haino W-B Han K Hasegawa K Hattori H Hayakawa K Hayama Y Himemoto N Hirata C Hirose T-C Ho B-H Hsieh H-F Hsieh C Hsiung H-Y Huang P Huang Y-C Huang Y-J Huang D C Y Hui S Ide K Inayoshi Y Inoue K Ito Y Itoh C Jeon H-B Jin K Jung P Jung K Kaihotsu T Kajita M Kakizaki M Kamiizumi N Kanda T Kato K Kawaguchi C Kim J Kim J C Kim Y-M Kim N Kimura T Kiyota Y Kobayashi K Kohri K Kokeyama A K H Kong N Koyama C Kozakai J Kume Y Kuromiya S Kuroyanagi K Kwak E Lee H W Lee R Lee M Leonardi K L Li P Li L C -C Lin C-Y Lin E T Lin F-K Lin F-L Lin H L Lin G C Liu L-W Luo M Ma’arif E Majorana Y Michimura N Mio O Miyakawa K Miyo S Miyoki Y Mori S Morisaki N Morisue Y Moriwaki K Nagano K Nakamura H Nakano M Nakano Y Nakayama T Narikawa L Naticchioni L Nguyen Quynh W-T Ni T Nishimoto A Nishizawa S Nozaki Y Obayashi W Ogaki J J Oh K Oh M Ohashi T Ohashi M Ohkawa H Ohta Y Okutani K Oohara S Oshino S Otabe K-C Pan A Parisi J Park F E Pe na Arellano S Saha Y Saito K Sakai T Sawada Y Sekiguchi L Shao Y Shikano H Shimizu K Shimode H Shinkai T Shishido A Shoda K Somiya I Song R Sugimoto J Suresh T Suzuki H Tagoshi H Takahashi R Takahashi S Takano H Takeda M Takeda K Tanaka T Tanaka S Tanioka A Taruya T Tomaru T Tomura L Trozzo T Tsang J-S Tsao S Tsuchida T Tsutsui D Tuyenbayev N Uchikata T Uchiyama A Ueda T Uehara K Ueno G Ueshima T Ushiba M H P M van Putten J Wang T Washimi C Wu H Wu T Yamada K Yamamoto T Yamamoto K Yamashita R Yamazaki Y Yang S Yeh J Yokoyama T Yokozawa T Yoshioka H Yuzurihara S Zeidler M Zhan H Zhang Y Zhao Z-H Zhu The KAGRA Collaboration Graduate School of Science Tokyo Institute of Technology Meguro-ku Tokyo 152-8551 Japan Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Department of Physics The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan Research Center for the Early Universe (RESCEU) The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan Earthquake Research Institute The University of Tokyo Bunkyo-ku Tokyo 113-0032 Japan Department of Mathematics and Physics Gravitational Wave Science Project Hirosaki University Hirosaki City Aomori 036-8561 Japan Kamioka Branch National Astronomical Observatory of Japan (NAOJ) Kamioka-cho Hida City Gifu 506-1205 Japan The Graduate University for Advanced Studies (SOKENDAI) Mitaka City Tokyo 181-8588 Japan Korea Institute of Science and Technology Information (KISTI) Yuseong-gu Daejeon 34141 Republic of Korea National Institute for Mathematical Sciences Yuseong-gu Daejeon 34047 Republic of Korea School of High Energy Accelerator Science The Graduate University for Advanced Studies (SOKENDAI) Tsukuba City Ibaraki 305-0801 Japan Department of Astronomy Beijing Normal University Beijing 100875 People’s Republic of China Department of Applied Physics Fukuoka University Jonan Fukuoka City Fukuoka 814-0180 Japan Department of Physics Tamkang University Danshui Dist. New Taipei City 25137 Taiwan Department of Physics and Institute of Astronomy National Tsing Hua University Hsinchu 30013 Taiwan Department of Physics Center for High Energy and High Field Physics National Central University Zhongli District Taoyuan City 32001 Taiwan Department of Physics National Tsing Hua University Hsinchu 30013 Taiwan Institute of Physics Academia Sinica Nankang Taipei 11529 Taiwan Univ. Grenoble Alpes Laboratoire d’Annecy de Physique des Particules (LAPP) Université Savoie M

During April 7–21 2020, KAGRA conducted its first scientific observation in conjunction with the GEO600 detector. The dominant noise sources during this run were found to be suspension control noise in the low-frequency range and acoustic noise in the mid-frequency range. In this study, we show that their contributions in the observational data can be reduced by a signal processing method called independent component analysis (ICA). The model of ICA is extended from that studied in the initial KAGRA data analysis to account for frequency dependence, while the linearity and stationarity of the coupling between the interferometer and the noise sources are still assumed. We identify optimal witness sensors in the application of ICA, leading to successful mitigation of these two dominant contributions. We also analyze the stability of the transfer functions for the entire two weeks of data to investigate the applicability of the proposed subtraction method in gravitational wave searches.

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Interactive reflection simulation via physical shading model and fast environment mapping

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ICIC Express Letters, Part B: Applications 2016年第2期7卷 351-356页

作者： Xu, Jie Fu, Jinhua School of Software Zhengzhou University of Light Industry China School of Computer and Communication Engineering Zhengzhou University of Light Industry No. 5 Dongfeng Road Zhengzhou China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Zhengzhou China

In order to enhance realistic reflection effects on some objects and realize faster rendering to meet interactive requirements, we present a novel method to produce interactive reflection simulation using physical shading model and fast environment mapping. The physical shading model could efficiently express ambient lighting, specular lighting and diffuse lighting. Also the model is based on the microfacet distribution function, which can describe physics-based characteristics. Fast environment mapping is realized by Spherical Harmonics (SH) transformation, and the rendering equation can be rewritten as a simple dot product of SH coefficients, which fits for GPU (Graphics Processing Unit) computation. The results show that we can realize faster rendering and acquire realistic reflection effects such as glossy and mapping scene on the surface. © 2016 ICIC International.

关键词： Lighting

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