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Threshold proxy quantum signature scheme with threshold shared verification

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Science China(Physics,Mechanics & Astronomy) 2008年第8期51卷 1079-1088页

作者： YANG YuGuang1,3,4.& WEN QiaoYan2.1 College of Computer Science and Technology,beijing university of Technology,beijing 10012.,China 2.State key laboratory of Networking and Switching Technology,beijing university of Posts and Tele-communications,beijing 100876,China 3 State key laboratory of Integrated Services Network,Xidian university,Xi’an 710071,China 4.State key laboratory of information Security(Graduate university of Chinese Academy of Sciences) ,beijing 10004.,China College of Computer Science and Technology Beijing University of Technology Beijing China State key laboratory of Integrated Services Network Xidian University Xi’an China State key laboratory of {2. Security (Graduate university of Chinese Academy of Sciences) Beijing China State key laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

A threshold proxy quantum signature scheme with threshold shared verification is proposed. An original signer could authorize a group as its proxy signers. Then only t or more of n persons in the proxy group can generate the proxy signature on behalf of the original signer and any t-1 or fewer ones cannot do that. When the proxy signature needs to be verified,any t or more of n persons belonging to the verification group can verify the message and any t-1 or fewer ones cannot verify the validity of the proxy signature.

关键词： quantum signature threshold proxy quantum group signature threshold shared verification

Threshold quantum secret sharing between multi-party and multi-party

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Science China(Physics,Mechanics & Astronomy) 2008年第9期51卷 1308-1315页

作者： YANG YuGuang1,2.3 & WEN QiaoYan4.1 College of Computer Science and Technology,beijing university of Technology,beijing 10012.,China 2.State key laboratory of Integrated Services Network,Xidian university,Xi’an 710071,China 3 State key laboratory of information Security (Graduate university of Chinese Academy of Sciences),beijing 10004.,China 4.State key laboratory of Networking and Switching Technology,beijing university of Posts and Tele-communications,beijing 100876,China College of Computer Science and Technology Beijing University of Technology Beijing China State key laboratory of Integrated Services Network Xidian University Xi’an China State key laboratory of {2. Security (Graduate university of Chinese Academy of Sciences) Beijing China State key laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

A threshold quantum secret sharing (TQSS) scheme between multi-party and multi-party was proposed using a sequence of single photons,which is useful and efficient when the parties of communication are not all present. We described the process of this TQSS scheme and discussed its security. It was shown that entan-glement is not necessary for quantum secret sharing. Moreover,the theoretic effi-ciency was improved to approach 100% as almost all the instances can be used for generating the private {2.,and each photon can carry one bit of information. This protocol is feasible with the present-day technique.

关键词： threshold quantum secret sharing quantum cryptography single photon multi-party and multi-party

An efficient quantum secret sharing protocol with orthogonal product states

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Science China(Physics,Mechanics & Astronomy) 2007年第3期50卷 331-338页

作者： YANG YuGuang1,2. WEN QiaoYan3 & ZHU FuChen4.1 School of Computer, beijing university of Technology, beijing 10002., China 2.State key laboratory of information Security, Graduate university of Chinese Academy of Sciences, beijing 10002., China 3 School of Science, beijing university of Posts and Telecommunications, beijing 100876, China 4.National key laboratory for Modern Communications, Chengdu 61004., China School of Computer Beijing University of Technology Beijing China State key laboratory of {2. Security Graduate University of Chinese Academy of Sciences Beijing China School of Science Beijing University of Posts and Telecommunications Beijing China National key laboratory for Modern Communications Chengdu China

An efficient quantum secret sharing protocol with orthogonal product states in the 33 Hilbert space is presented. The particles in the orthogonal product states form two particle sequences. One sequence is sent to Bob and the other is sent to Charlie after rearranging the particle orders. With the help of Alice, Bob and Charlie make the corresponding local measurement to obtain the information of the or- thogonal product states prepared. This protocol has many distinct features such as great capacity and high efficiency.

关键词： quantum secret sharing orthogonal product state orthogonal measurement

Monitoring of rice crop using ENVISAT ASAR data

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Science China Earth Sciences 2006年第7期49卷 755-763页

作者： DONG Yanfang1, 2. SUN Guoqing1,3 & PANG Yong4.1. State key laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, {2. 100101, China 2. Graduate university of Chinese Academy of Sciences, {2. 100039, China 3. department of Geography, university of Maryland, College Park, MD 2.74.0} USA 4. Forest Remote Sensing Lab, Research Institute of Forest Resource and information Technology, Chinese Academy of For-estry, {2. 100091, China State key laboratory of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing China Graduate university of Chinese Academy of Sciences Beijing China department of Geography University of Maryland College Park USA Forest Remote Sensing Lab Research Institute of Forest Resource and Information Technology Chinese Academy of Forestry Beijing China

Because of the cloudy conditions during the rice growth period, rice is one of the agri-cultural crops most suited to monitoring with the SAR instruments. Backscatter response measured by SAR is correlated with rice conditions, including height, density, biomass and structure, which are variable at different growing stages. In this paper, multi-date ENVISAT ASAR Alternating Polarization Mode (APMode) imageries were acquired during the rice crop growing cycle. At the same time, the rice parameters were measured in field. A continuous canopy model was used to compute the back-scattering from rice fields during the growth cycle, and the relationship between rice parameters and radar backscattering coefficients from both ASAR and modeling was analyzed. The effects of polari-zation, incidence angle and polarization on radar backscattering coefficients were analyzed. It was found that simulated radar backscatter has similar trends as ASAR data. This will be meaningful for the further research of rice parameters estimation from ASAR data. Different features show signifi-cantly different signatures in ASAR images and they follow some certain laws, so rice area can be accurately mapped by using multi-temporal SAR images, then rice yield can be estimated.

关键词： rice, ASAR, radar backscattering, model.

Polynomial analysis of canopy spectra and biochemical component content inversion

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Science China Earth Sciences 2005年第10期48卷 1780-1791页

作者： YAN Chunyan1, LIU Qiang1, NIU Zheng1, WANG Jihua2. HUANG Wenjiang2.& LIU Liangyun 2.1. State key {4. of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and {2. Normal university, {2. 100101, China 2. National Engineering Research Center for information Technology in Agriculture, {2. 100089, China Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and beijing Normal university National Engineering Research Center for information Technology in Agriculture

A polynomial expression model was developed in this paper to describe directional canopy spectra, and the decomposition of the polynomial expression was used as a tool for re-trieving biochemical component content from canopy multi-angle spectra. First, the basic formula of the polynomial expression was introduced and the physical meaning of its terms and coeffi-cients was discussed. Based on this analysis, a complete polynomial expression model and its decomposition method were given. By decomposing the canopy spectra simulated with SAILH model, it shows that the polynomial expression can not only fit well the canopy spectra, but also show the contribution of every order scattering to the whole reflectance. Taking the first scattering coefficients a10 and a01 for example, the test results show that the polynomial coefficients reflect very well the hot spot phenomenon and the effects of viewing angles, LAI and leaf inclination angle on canopy spectra. By coupling the polynomial expression with leaf model PROSPECT, a canopy biochemical component content inversion model was given. In the simulated test, the canopy multi-angle spectra were simulated by two different models, SAILH and 4.SCALE re-spectively, then the biochemical component content was retrieved by inverting the coupled polynomial expression + PROSPECT model. Results of the simulated test are promising, and when applying the algorithm to measured corn canopy multi-angle spectra, we also get relatively accurate chlorophyll content. It shows that the polynomial analysis provides a new method to get biochemical component content independent of any specific canopy model.

关键词： polynomial expression, canopy spectra, decomposition, biochemical component content, inversion.

The structural analysis of fuzzy measures

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Science China(information Sciences) 2011年第1期54卷 38-50页

作者： ZHANG Ling1,ZHANG Bo2.& ZHANG YanPing1 1 Computer Science College,Anhui university,Hefei 2.0039,China 2.tate {4. Lab of Intelligent Technology & Systems {2. National Lab for information Science & Technology information Science & Technology College,Computer Science & Technology,{2. university,beijing 100084.China Computer Science College Anhui University Hefei China State key Lab of Intelligent Technology & Systems tsinghua National Lab for information Science & Technology information Science & Technology College Computer Science & Technology Tsinghua University Beijing China

From quotient space based granular computing theory we explore the fuzzy measures of fuzzy sets. Based on the structural analysis of fuzzy sets,we present an"isotropism"*** this assumption we achieved the following insights:(1)the uniqueness of a fuzzy measure being isotropic on a finite complete semi-ordered set;(2.the necessary and suffcient condition of the isomorphism for fuzzy measure functions in fuzzy mathematics;(3)the necessary and suffcient condition that fuzzy measures have fuzzy and granular monotonicity;(4.under a certain assumption,the analytic expression for fuzzy *** results clarify the relationship between fuzzy measures and granular computing,reveal the essence of fuzzy measures,and provide a simple way of constructing fuzzy measures.

关键词： quotient space fuzzy set fuzzy measure rough set structural analysis

Construction of nonbinary quantum cyclic codes by using graph method

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Science in China(Series F) 2005年第6期48卷 693-702页

作者： LIU Tailin1,2.3, WEN Qiaoyan1 & LIU Zihui4.1. School of Science, beijing university of Posts and Telecommunications, beijing 100876, China 2. State key laboratory of Integrated Services Network, Xidian university, Xi’an 710071,China 3. Shandong Finance Institute, Jinan 2.0014. China 4. School of Mathematical Sciences, Peking university, beijing 100871, China School of Science Beijing University of Posts and Telecommunications Beijing China State key laboratory of Integrated Services Network Xidian University Xi’an China Shandong Finance Institute Jinan China School of Mathematical Sciences Peking University Beijing China

Using the graph method proposed by Schlingemann and Werner, this paper introduces a technique to construct nonbinary quantum cyclic codes and provides a specific example. We also construct the quantum codes [[8, 2. 4.... 详细信息

关键词： nonbinary quantum stabilizer codes quantum cyclic codes

On an attack on RSA with small CRT-exponents

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Science China(information Sciences) 2010年第8期53卷 1511-1518页

作者： HAN LiDong 1,2., WANG XiaoYun 3 & XU GuangWu 3,4.1 key laboratory of Cryptologic Technology and {2. Security, Ministry of Education, Shandong {4., Jinan 2.0100, China 2.School of Mathematics, Shandong {4., Jinan 2.0100, China 3 Institute for Advanced Study, tsinghua university, beijing 100084. China 4.department of Electrical Engineering and Computer Science, {4. of Wisconsin-Milwaukee, Milwaukee, WI 532.1, USA key laboratory of Cryptologic Technology and {2. Security Ministry of Education Shandong University Jinan China School of Mathematics Shandong University Jinan China Institute for Advanced Study Tsinghua University Beijing China department of Electrical Engineering and Computer Science University of Wisconsin-Milwaukee Milwaukee USA

This paper concerns the RSA system with private CRT-exponents. Since Chinese remainder representation provides efficiency in computation, such system is of some practical significance. In this paper, an existing attack to small private CRT-exponents is analyzed. It is indicated that this attack makes nice use of lattice in RSA analysis, but some argument does not hold in general. Several counterexamples are constructed. Refinements and more precise statements of the attack are given.

关键词： RSA CRT cryptanalysis continued fraction lattice reduction

The quantification of remote sensing

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Science China(Technological Sciences) 2005年第S2期48卷 1-11页

作者： GU Xingfa1,2.3,TIAN Guoliang1,2. LI Xiaowen1,2.& GUO Jianning4.1. State key {4. of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and {2. Normal university, {2. 100101, China 2. The Center for National Spaceborne Demonstration, {2. 100101, China 3. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84.14.Avignon, France 4. China Center for Resource Satellite Data and Application, {2. 100830, China State key laboratory of Remote Sensing Science Beijing Normal University Chinese Academy of Sciences Beijing 100101 China Center for National Spaceborne Demonstration Beijing 100101 China Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France China Center for Resource Satellite Data and Application Beijing 100830 China

The paper firstly defined the remote sensing information quantification, analyzed the necessity of developing remote sensing quantification, figured out the application guidelines requirement, and pointed out the importance of quantification research. Then taking the remote sensing application research of CBERS-02.data quantification as the example, the paper described the whole quantification system of “remotely sensed digital signal-radiation information-field parameter inversion”. Finally the paper gave the prospect for the development trend of the quantitative remote sensing.

关键词： remote sensing information quantification CBERS-02 radiometric calibration surface parame- ter reversion.