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Practical security against linear cryptanalysis for SMS4-like ciphers with SP round function

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Science China(information Sciences) 2012年第9期55卷 2161-2170页

作者： ZHANG Bin 1,2.& JIN ChenHui 2.1 P.O.Box 1936,Beijing 100193,China 2.electronic technology {2.,information engineering university,zhengzhou 450004,China Beijing China electronic technology {2. Information Engineering University Zhengzhou China

SMS4,a block cipher whose global structure adopts a special unbalanced Feistel scheme with SP round function,is accepted as the Chinese National Standard for securing Wireless *** this paper,in order to evaluate the security against linear cryptanalysis,we examine the upper bound of the maximum linear characteristic probability of SMS4-like ciphers with SP round *** the same way as for SPN ciphers,it is sufficient to consider the lower bound of the number of linear active *** propose a formula to compute the lower bound of the number of linear active s-boxes with regard to the number of *** security threshold of SMS4-like ciphers can be estimated easily with our ***,if the number of input words in each round of SMS4-like cipher is m,we find that it is unnecessary for designers to make the linear branch number of P greater than 2.m with respect to linear cryptanalysis.

关键词： block cipher SMS4-like cipher practical security linear cryptanalysis

Using New Fusion Operations to Improve Trust Expressiveness of Subjective Logic

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Wuhan university Journal of Natural Sciences 2011年第5期16卷 376-382页

作者： ZHOU Hongwei1,2.3,SHI Wenchang1,2.LIANG Zhaohui1,2.LIANG Bin1,2.1.Key Laboratory of Data engineering and Knowledge engineering,Ministry of Education,Beijing 100872.China 2.School of {2.,Renmin university of China,Beijing 100872.China 3.institute of electronic technology,information engineering university of pla,zhengzhou 450004,henan,China Key Laboratory of Data engineering and Knowledge engineering Ministry of Education Beijing China School of information Renmin University of China Beijing China institute of electronic {2. Information Engineering University of PLA Zhengzhou Henan China

Subjective logic provides a means to describe the trust relationship of the realworld. However, existing fusion operations it offers Weal fused opiniotts equally, which makes it impossible to deal with the weighted opinions effectively. A. Jcsang presents a solution, which combines the discounting operator and the fusion operator to produce the consensus to the problem. In this paper, we prove that this approach is unsuitable to deal with the weighted opinions because it increases the uncertainty of the consensus. To address the problem, we propose two novel fusion operators that are capable of fusing opinions according to the weight of opinion in a fair way, and one of the strengths of them is improving the trust expressiveness of subjective logic. Furthermore, we present the justification on their definitions with the mapping between the evidence space and the opinion space. Comparisons between existing operators and the ones we proposed show the effectiveness of our new fusion operations.

关键词： trust subjective logic opinion fusion weizht

Main chemical ingredients of the celadon glaze from Qingliangsi kiln and Zhanggongxiang kiln

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Science China(Physics,Mechanics & Astronomy) 2006年第4期49卷 487-495页

作者： ZHAO Weijuan1, LU Xiaoke1, LI Guoxia1, GUO Min1, XIE Jianzhong1, GAO Zhengyao1, SUN Xinmin2. GUO Musen2. CHENG Huansheng3 & ZHANG Bin3 1. Faculty of Physical engineering, zhengzhou {2., zhengzhou 450052. China 2. Research institute of Cultural Relic and Archaeology, henan Province, zhengzhou 450004, China 3. Research institute of Modern Physics, Fudan {2., Shanghai 2.0433, China Faculty of Physical engineering Zhengzhou University Zhengzhou China Research institute of Cultural Relic and Archaeology Zhengzhou China Research institute of Modern Physics Fudan University Shanghai China

The proton induced X-ray emission (PIXE) is used to determine the chemical ingredients of seven main elements in the samples of Ru Guan porcelain glazes and Ru Civil porcelain from Qingliangsi kiln in Baofeng County and the samples of celadon glaze from Zhanggongxiang kiln in Ruzhou City. The PIXE data are then analyzed by scatter analysis and fuzzy cluster method for determining their classification and provenance. The results show that there are obvious differences between the ingredients of glaze material of Ru Guan porcelain and Ru Civil porcelain from Qingliangsi kiln, of which the former ingredients are stable and its source is localized, and that the sources and ingredients of the glaze of Ru Guan porcelain and those of celadon glaze from Zhanggongxiang kiln are not wholly the same, of which the latter sources are much scattering.

关键词： Zhanggongxiang kiln, Qingliangsi kiln, the source of raw material, the proton induced X-ray emission.

Multiparty simultaneous quantum identity authentication with secret sharing

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Science China(Physics,Mechanics & Astronomy) 2008年第3期51卷 321-327页

作者： YANG YuGuang1,2.WEN QiaoYan3 & ZHANG Xing4,5 1 College of Computer Science and technology,Beijing university of technology,Beijing 10002.,China 2.State Key Laboratory of information Security (Graduate university of the Chinese Academy of Sciences),Beijing 100049,China 3 School of Science,Beijing university of Posts and Telecommunications,Beijing 100876,China 4 institute of electronic technology,information engineering university,{12.,China 5 Trusted Computing Laboratory,Beijing university of technology,Beijing 10002.,China College of Computer Science and technology Beijing University of Technology Beijing China State Key Laboratory of information Security (Graduate university of the Chinese Academy of Sciences) Beijing China School of Science Beijing University of Posts and Telecommunications Beijing China institute of electronic {2. Information Engineering University Zhengzhou China Trusted Computing Laboratory Beijing University of Technology Beijing China

Two multiparty simultaneous quantum identity authentication (MSQIA) protocols based on secret sharing are presented. All the users can be authenticated by a trusted third party (TTP) simultaneously. In the first protocol,the TTP shares a random key K with all the users using quantum secret sharing. The ith share acts as the authentication key of the ith user. When it is necessary to perform MSQIA,the TTP generates a random number R secretly and sends a sequence of single photons encoded with K and R to all the users. According to his share,each user performs the corresponding unitary operations on the single photon sequence sequentially. At last,the TTP can judge whether the impersonator exists. The sec-ond protocol is a modified version with a circular structure. The two protocols can be efficiently used for MSQIA in a network. They are feasible with current technol-ogy.

关键词： quantum identity authentication secret sharing quantum cryptography

A fingerprint feature extraction algorithm based on curvature of Bezier curve

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Progress in Natural Science:Materials International 2007年第11期17卷 1376-1381页

作者： Yuan Huaqiang1, Ye Yangdong2. Deng Jianguang2. Chai Xiaoguang1 and Li Yong1(1. School of Software, Dongguan university of technology, Dongguan 52.808, China 2. {2. engineering institute, zhengzhou university, zhengzhou 450001, China) School of Software Dongguan University of Technology Dongguan 523808 China information engineering {2. Zhengzhou University Zhengzhou 450001 China

Fingerprint feature extraction is a key step of fingerprint identification. A novel feature extraction algorithm is proposed in this paper, which describes fingerprint feature with the bending information of fingerprint ridges. Ridges in the specific region of fingerprint images are traced firstly in the algorithm, and then these ridges are fit with Bezier curve. Finally, the point that has the maximal curvature on Bezier curve is defined as a feature point. Experimental results demonstrate that this kind of feature points characterize the bending trend of fingerprint ridges effectively, and they are robust to noise, in addition, the extraction precision of this algorithm is also better than the conventional approaches.

关键词： fingerprint identification feature extraction Bezier curve curvature

Effects of Al on Microstructure and High-Temperature Wear Properties of Austenitic Heat-Resistant Steel

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Journal of Iron and Steel Research International 2012年第3期19卷 62-66页

作者： ZHANG Yan1, SUN Yu-fu2. ZHAO Jing-yu2. GUAN Shao-kang2.(1. School of Materials engineering, Nanjing institute of {2., Nanjing 2.1167, Jiangsu, China 2. School of Materials Science and engineering, zhengzhou university, zhengzhou 450002. henan, China) School of Materials engineering Nanjing Institute of Technology Nanjing Jiangsu China School of Materials Science and engineering Zhengzhou University Zhengzhou Henan China

Microstructure and high-temperature dry sliding wear at 600 ~C in ambient air of austenitic heat-resistant steel ZG40Cr2.Ni2. with different contents （mass percent） of AI （0 to 7.10~） have been investigated. The results show that microstructures of 4.68% and 7.10% A1 addition content consist of the matrix and reinforcement of inter- metallic compound y＇ and carbide, while microstructures of ZG40Cr2.Ni2. without A1 and with A1 of 1.68% are ab- sent of y＇. Higher wear resistance than the original ZG40Cr2.Ni2. alloy is achieved in alloys with higher content of A1 under the same high-temperature wear test condition. The wear rates of Fe-2.Cr-2.Ni-7.10A1 and Fe-2.Cr-2.Ni- 4.68A1 are only 2..83% and 45.83% of that of Fe-2.Cr-2.Ni, respectively. Heat-resistant steels with higher con- tents of AI （4.72. and 7.10%） have higher hardness than those with lower contents of AI （1.68% and 0）. Wear mechanisms of ZG40Cr2.Ni2. are considered as severe plough plastic deformation and slight adhesive. However, wear mechanisms of Fe-2.Cr-2.Ni 4.68A1 are light micro-cutting and oxidation-wear, while that of Fe-2.Cr-2.Ni- 7. 10A1 are severe adhesive transfer and oxidation-wear_

关键词： austenitic heat resistant steel Al microstructure high-temperature sliding wear mechanism

A novel logic-based automatic approach to constructing compliant security policies

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Science China(information Sciences) 2012年第1期55卷 149-164页

作者： BAO YiBao1,2.4,YIN LiHua1,FANG BinXing 1,3&GUO Li 1 1institute of Computing technology,Chinese Academy of Sciences,Beijing 100190,China 2.0} of electronic technology,information engineering university,zhengzhou 450004,China 3Beijing university of Posts and Telecommunications,Beijing 100190,China 4Graduate university,the Chinese Academy of Science,Beijing 100049,China institute of Computing technology Chinese Academy of Sciences Beijing China institute of electronic {2. Information Engineering University Zhengzhou China Graduate university the Chinese Academy of Science Beijing China Beijing university of Posts and Telecommunications Beijing China

It is significant to automatically detect and resolve the incompliance in security *** existing works in this field focus on compliance verification,and few of them provide approaches to automatically correct the incompliant security *** paper proposes a novel approach to automatically transform a given security policy into a compliant *** security policy Π and delegation policy M declared by logic programs,the approach automatically rewrites Π into a new one ΠM which is compliant with M and is readable by the *** prove that the algorithm is sound and complete under noninterference ***,we show that the security policy query evaluation algorithm with conflict and unsettlement resolution still works very well on Π*** approach is automatic,so it doesn't require a administrator with excess *** this sense,our proposal can help us to save much manpower resource in security management and improves the security assurance abilities.

关键词： security policy rewriting logic program compliance

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基于Web管理技术的安全网络管理系统

计算机工程 2002年第1期28卷 170-171,238页

作者：王海洲李晓解放军信息工程大学电子技术学院郑州450004

分析了基于的网络管理技术,提出了一种解决网络管理安全的方法,并结合基于的网络管理技术进行了安全管理系统的原WebWeb 型设计与实现。

关键词： Web 管理技术网络管理安全代理安全网络管理系统计算机网络

Optimizing 2.-metal contact in layered Tin-selenide via native oxide modulation

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Nano Research 2024年第4期17卷 3014-3020页

作者： Yue Zheng Qi You Zhentian Yin Jian Tang Ke Jiang Zihao Xie henan Li Cheng Han Yumeng Shi International Collaborative Laboratory of 2. Materials for Optoelectronics Science and technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China College of electronics and information {2. Shenzhen UniversityShenzhen 518060China

The discovery of two-dimensional(2.)semiconductor has opened up new avenues for the development of short-channel field-effect transistors(FETs)with desired electrical *** them,orthorhombic tin-selenide(SnSe)has garnered increasing attention due to its potential applications in a variety of electronic,optoelectronic,and thermoelectric ***,the realization of high-performance SnSe FETs with low contact resistance(Rc)remains a ***,we systematically investigate the contact of few-layer SnSe FETs through the modulation of native oxide on SnSe by using different *** is found that chromium(Cr)-contacted devices possess the best FET performance,such as electron mobility up to 606 cm^(2./(V·s)at 78 K,current on/off ratio exceeding 1010,and saturation current of~550μA/μm,where a negligible Schottky barrier(SB)of~30 meV and a low contact resistance of~42.Ωμm are achieved.X-ray photoelectron spectroscopy(XPS)and cross-sectional electron dispersive X-ray spectroscopy(EDX)results further reveal that the improved contact arises from the Cr-induced reduction of native oxide(SnOx)to Sn,which thins the tunneling barrier for efficient electron *** findings provide a deep insight into the 2.-metal contact of SnSe and pave the way for its applications in future nanoelectronics.

关键词： few-layer SnSe field-effect transistors(FETs) Cr contact native oxide contact resistance(Rc) Schottky barrier(SB)