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Polar differential power attacks and evaluation

Science china(information sciences) 2012年第7期55卷 1588-1604页

作者： TANG Ming 1 ,QIU ZhenLong 1 ,GAO Si 1,2 ,YI Mu 3 ,LIU ShuBo 1 ,ZHANG HuanGuo 1 & JIN YingZhen 1 1 School of Computer Science,Wuhan university,Wuhan 430072,china 2.state key laboratory of information security,Institute of Software,chinese academy of sciences,beijing 100190,china 3 Centre for Computer and information security Research School of Computer Science and Software Engineering university of Wollongong,Wollongong,NSW 2522,Australia School of Computer Science Wuhan University Wuhan China state key laboratory of information security Institute of Software Chinese Academy of Sciences Beijing China Centre for Computer and information security Research School of Computer Science and Software Engineering University of Wollongong Wollongong Australia

Side channel attacks (SCAs) on security software and hardware have become major concerns on computer and system *** existing SCAs generally require the knowledge of the corresponding cryptographic algorithm and implementation adopted in the target; therefore,they are not fully suitable for practical *** this paper,we propose a novel SCA-polar differential power attack (polar DPA).We found that DPA peaks have different biases for different cryptographic algorithms and *** on these biases,we can successfully attack a block cipher,assuming that the cipher algorithm uses a secret key in its first round,without the knowledge of the cipher algorithm or *** rounds can be treated as a black *** present a detailed theoretical analysis and experiment to demonstrate the correctness and efficiency of our ***,our scheme has demonstrated an improvement over the leakage evaluation scheme due to Ichikawa et al.(CHES 2005).Our evaluation method can be used in electronic design automatic (EDA) flows and can help security circuit designers to understand the data leakage due to SCAs.

关键词： computer security differential power attack side channel attack

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Topography and functional information of plasma membrane

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Science china(Life sciences) 2008年第2期51卷 95-103页

作者： SUN DeLan1, CHEN JianMin1, SONG YanMei1, ZHU ChuanFeng2, PAN GeBo2 & WAN LiJun2 1 key laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, chinese academy of sciences, beijing 100093, china 2 Institute of Chemistry, chinese academy of sciences, beijing 100080, china key laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany Chinese Academy of Sciences Beijing China Institute of Chemistry Chinese Academy of Sciences Beijing China

By using atomic force microscope (AFM), the topography and function of the plasmalemma surface of the isolated protoplasts from winter wheat mesophyll cells were observed, and compared with dead protoplasts induced by dehydrating stress. The observational results revealed that the plasma membrane of living protoplasts was in a state of polarization. Lipid layers of different cells and membrane areas exhibited distinct active states. The surfaces of plasma membranes were unequal, and were characterized of regionalisation. In addition, lattice structures were visualized in some regions of the membrane surface. These typical structures were assumed to be lipid molecular complexes, which were measured to be 15.8±0.09 nm in diameter and 1.9±0.3 nm in height. Both two-dimensional and three-dimensional imaging showed that the plasmalemma surfaces of winter wheat protoplasts were covered with numerous protruding particles. In order to determine the chemical nature of the protruding particles, living protoplasts were treated by proteolytic enzyme. Under the effect of enzyme, large particles became relatively looser, resulting that their width was increased and their height decreased. The results demonstrated that these particles were likely to be of protein nature. These protein particles at plasmalemma surface were different in size and unequal in distribution. The diameter of large protein particles ranged from 200 to 440 nm, with a central micropore, and the apparent height of them was found to vary from 12 to 40 nm. The diameter of mid-sized protein particles was between 40―60 nm, and a range of 1.8―5 nm was given for the apparent height of them. As for small protein particles, obtained values were 12―40 nm for their diameter and 0.7―2.2 nm for height. Some invaginated pits were also observed at the plasma membrane. They were formed by the endocytosis of protoplast. Distribution density of them at plasmalemma was about 16 pits per 15 μm2. According to their size, we clas

关键词： atomic force microscope winter wheat protoplast plasma membrane surface membrane protein invaginated pits

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Algebraic Attack on Filter-Combiner Model keystream Generators

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Wuhan university Journal of Natural sciences 2005年第1期10卷 259-262页

作者： WUZhi-ping YEDing-feng MAWei-ju statekeylaboratoryofinformationsecurity（graduateSchoolofchineseacademyofsciences） Beijing100039China

Algebraic attack was applied to attack Filter-Combintr model keystreamgenerators. We proposed the technique of function composition to improve the model, and the improvedmodel can resist the algebraic attack. A new criterion for designing Filter-Combiner model was alsoproposed: the total length I. of Linear Finite state Machines used in the model should be largeenough and the degree d of Filter-Combiner function should be approximate [L/2].

关键词： algebraic attack Filter-Combiner model stream cipher 'XL' algorithm function composition

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Spatial pattern of land cover change in china's semiarid environment

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Journal of Arid Land 2009年第1期1卷 16-25页

作者： BaoLin LI1 and QiMing ZHOU2 1 state key laboratory of Environment and Resources information System, Institute of Geographical sciences and Resources Research, chinese academy of sciences, beijing 100101, china 2 Department of Geography, Hong Kong Baptist university, Kowloon Tong, Hong Kong, china state key laboratory of Environment and Resources information System Institute of Geographical Sciences and Resources Research Chinese Academy of Sciences Beijing 100101 China Department of Geography Hong Kong Baptist University Kowloon Tong Hong Kong

This study seeks a routine to quantify spatial pattern of land cover changes in semiarid environment of china based on post-classification comparison method. The method consists of three major steps: (1) the image classification and unification of classified results based on two-level land cover classification themes, (2) the establishment of land cover change classes based on an unification land cover classification theme, (3) the reclassification and mapping of land cover change classes with three overall classes including no-change, gain and loss based on the unification land cover class. This method was applied to detect the spatial pattern of land cover changes in Yinchuan Plain, one of famous irrigation agricultural zones of the Yellow River, china. The results showed the land cover had undergone a remarkable change from 1991 to 2002 in the study area (the changed area was over 30%). Rapid increase of cropland (12.5%), built-up area (131.4%) and rapid decrease of bare ground (51.7%) were alarming. The spatial pattern of land cover changes showed clear regional difference in the study area and was clearly related to human activities or natural factors. Thus, it obtained a better understanding of the human impact on the fragile ecosystem of china’s semiarid environment.

关键词： change detection spatial pattern land cover semiarid zone of china remote sensing human activities

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Secure network coding in the presence of eavesdroppers

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Science china(information sciences) 2010年第3期53卷 648-658页

作者： LUO MingXing1,2,3, YANG YiXian1,2,3, WANG LiCheng1,2,3 & NIU XinXin1,2,3 1information security Center, state key laboratory of Networking and Switching Technology, beijing university of Posts and Telecommunications, beijing 100876, china 2key laboratory of Network and information Attack and Defence Technology of MOE, beijing university of Posts and Telecommunications, beijing 100876, china 3National Engineering laboratory for Disaster Backup and Recovery, beijing university of Posts and Telecommunications, beijing 100876, china information security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China key laboratory of Network and information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing China National Engineering laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing China

Our concern, in the paper, is to construct information-theoretic secure network coding in the presence of eavesdroppers. Based on the generalized attack model and all-or-nothing transformation, the security of network coding in the generalized combination network can be characterized by the network capacity and the min-cut bound of wiretapping set from the source. Furthermore, it can be extended to any directed acyclic networks with single source. Compared with the traditional results, we construct information-theoretic secure network coding without additional encryptions and giving up any capacity.

关键词： all-or-nothing transformation secure network coding eavesdropping

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A particle-based method for granular flow simulation

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Science china(information sciences) 2012年第5期55卷 1062-1072页

作者： CHANG YuanZhang 1,BAO Kai 2,3,ZHU Jian 1 & WU EnHua 1,2 1 Department of Computer and information Science,university of Macau,Macao,china 2.state key laboratory of Computer Science,Institute of Software,chinese academy of sciences,beijing 100190,china 3 Division of Mathematical and Computer sciences & Engineering,KAUST,Thuwal,Saudi Arabia Department of Computer and information Science University of Macau Macao China state key laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing China Division of Mathematical and Computer sciences & Engineering KAUST Thuwal Saudi Arabia

We present a new particle-based method for granular flow *** the method,a new elastic stress term,which is derived from a modified form of the Hooke's law,is included in the momentum governing equation to handle the friction of granular *** force is also added to simulate the dynamic friction for the purpose of smoothing the velocity field and further maintaining the simulation *** from the Lagrangian nature of the SPH method,large flow deformation can be well handled easily and *** addition,a signed distance field is also employed to enforce the solid boundary *** experimental results show that the proposed method is effective and efficient for handling the flow of granular materials,and different kinds of granular behaviors can be well simulated by adjusting just one parameter.

关键词： granular materials sand smoothed particle hydrodynamics SPH Hooke’s law animation simu-lation

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Threat and management strategies of potentially invasive insects in china

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Science china(Life sciences) 2009年第10期52卷 903-910页

作者： ZHANG RunZhi1, ZHANG YaPing2 & JIANG YouXu3 1 state key laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, chinese academy of sciences, beijing 100101, china 2 Kunming Institute of Zoology, chinese academy of sciences, Yunnan, 650223, china 3 The Research Institute of Forest Ecology, Environment and Protection, The chinese academy of Forestry, beijing 100091, china state key laboratory of Integrated Management of Pest Insects and Rodents in Agriculture Institute of Zoology Chinese Academy of Sciences Beijing China Kunming Institute of Zoology Chinese Academy of Sciences Yunnan China The Research Institute of Forest Ecology Environment and Protection The Chinese Academy of Forestry Beijing China

The Global Invasive Species Database, GISD, comprises 27 species of the most significant invasive alien insects in the world (through November, 2005), 6 of which are originally native to china, 11 are established in china, and 10 have a potential invasion threat to china. This paper discusses these species in terms of distribution, harmfulness and dispersal ways, and finds that: (i) information re-garding invasive insects in the GISD remains inadequate. Such harmful invasive species as Opogona sacchari (Bojer), Oracella acuta (Lobdell), and Dendroctonus valens LeConte are not included. (ii) Ten species of invasive insects, particularly Lasius neglectus Van Loon and Linepithema humile (Mayr) which become established in areas near china, have the potential to become established in china. (iii) Special attention should be paid to species from Asia and the Americas because of their greater likeli-hood of becoming established in china. Finally, some management strategies including legislation, quarantine, early warning, prevention and control are suggested.

关键词： biological invasions invasive species insect china

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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 Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications state key laboratory of information 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

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Capability description and discovery of Internetware entity

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Science china(information sciences) 2010年第4期53卷 685-703页

作者： WANG PuWei1*, JIN Zhi2,3* & LIU HongYan4 1key laboratory of Data Engineering and Knowledge Engineering of the Ministry of Education, Renmin university of china, beijing 100872, china 2key laboratory of High Confidence Software Technologies of the Ministry of Education, Peking university, beijing 100871, china 3academy of Mathematics and System sciences, chinese academy of sciences, beijing 100190, china 4Department of Management Science and Engineering, Tsinghua university, beijing 100084, china key laboratory of Data Engineering and Knowledge Engineering of the Ministry of Education Renmin University of China Beijing China key laboratory of High Confidence Software Technologies of the Ministry of Education Peking University Beijing China academy of Mathematics and System sciences Chinese Academy of Sciences Beijing China Department of Management Science and Engineering Tsinghua University Beijing China

Internetware can be formed through aggregation of Internetware entities bottom-up to satisfy the user's requirements. In the process, capability description of Internetware entity plays an important role. This paper proposes a capability description of Internetware entity based on environment ontology. The environment ontology includes environment entities and possible interactions with the environment entities in a particular domain. Tree-like hierarchical state machines are also included in the ontology to describe domain life-cycle of the environment entities. On the basis of the ideas, the capability of Internetware entity is embodied by interacting with environment entities and the changes of the environment entities during the interactions. Finally, this paper describes the matchmaking between capability descriptions of Internetware entities to support the discovery of Internetware entity. An example of online education course is given to illustrate the ideas.

关键词： Internetware capability description domain environment ontology tree-like hierarchical state machine

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Differential Hydrological Grey Model (DHGM) with self-memory function and its application to flood forecasting

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Science china(Technological sciences) 2009年第4期52卷 1039-1049页

作者： CHEN XiangDong1, XIA Jun1,2 & XU Qian3 1 key laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic sciences and Natural Resources Research, chinese academy of sciences, beijing 100101, china 2.state key laboratory of Water Resources and Hydropower Engineering Science, Wuhan university, Wuhan 430072, china 3 School of Hydrology and Water Resources, Hohai university, Nanjing 210098, china key laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China state key laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan China School of Hydrology and Water Resources Hohai University Nanjing China

This paper addresses a problem of flood forecasting with the self-memory function. Considering flood forecasting’s uncertainty and updating demand, a hybrid hydrological model, namely Differential Hy- drological Grey Model with self-memory function (DHGM-SM), is developed. The model has two fold features. One is to establish a self-memorization equation linked with DHGM, that could extract useful information from past data series and realize updating of hydrological dynamic process. The other is that this model has higher efficiency relative to original hydrological model without self-memory func- tion. This approach was applied to river flow forecasting of two representative basins in Tunxi of South china and Daqinggou of North china. It is shown that this hybrid method has satisfactory forecasting accuracy by examination of both calibration and validation.

关键词： differential grey model the self-memorization principle real-time forecasting faded-memory recursive least square method

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