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Dynamic tree-based authenticated group key exchange protocol

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Science china(information sciences) 2010年第8期53卷 1591-1602页

作者： li hui 1,2 , wu chuankun 1 & TENG JiKai 1,2 1 state key laboratory of information security, institute of software, chinese academy of sciences, beijing 100190, china 2 Graduate University of chinese academy of sciences, beijing 100049, china state key laboratory of information security Institute of Software Chinese Academy of Sciences Graduate University of chinese academy of sciences

Authenticated group key exchange protocols allow a group of users over a public network to establish a shared secret key for the subsequent cryptographic goals. In this paper, we extend BD-II scheme into a dynamic setting, and propose a tree-based authenticated key exchange protocol which is more suitable for dynamic groups in such as ad hoc networks. Our protocol is proven secure in random-oracle model. Additionally, we analyze the costs of our protocols in both communication and computation terms, and compare its performance with three well-known protocols.

关键词： tree-based group key exchange dynamic provable security

A new one-bit diFFerence collision attack on HAVAL-128

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Science china(information sciences) 2012年第11期55卷 2521-2529页

作者： ZHANG WenYing1,2,3,li YanYan1 & wu Lei1 1School of information Science and Engineering,Shandong Normal University,Jinan 250014,china 2state key Lab of information security,institute of information Engineering,chinese academy of sciences,beijing 100093,china 3Shandong Provincial key laboratory for Novel Distributed Computer software Technology,Jinan 250014,china School of information Science and Engineering Shandong Normal University Jinan China state key Lab of information security Institute of Information Engineering Chinese Academy of Sciences Beijing China Shandong Provincial key laboratory for Novel Distributed Computer software Technology Jinan China

In this paper,we give a new fast attack on *** attack includes many present methods of constructing hash ***,we present a neighborhood *** propose a new difference path different from the previous *** conclusion is that,when the output of each step satisfies our condition,the message m can collide with m'= m + Δm,where Δm =(0,0,0,0,231,0,...,0).There is only one bit difference between m and m'.Two pairs of collision examples for HAVAL-128 are *** order to improve the probability of collision,we use four tricks of message *** attack's running time is less than 225.83 2-pass HAVAL computations,which is the best result for one-bit collision of HAVAL so far.

关键词： cryptography hash function HAVAL-128 collision message modification

QKD扩展BB84协议的Breidbart基窃听问题

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物理学报 2002年第5期51卷 961-965页

作者：杨理吴令安刘颂豪中国科学院研究生院信息安全国家重点实验室北京100039 中国科学院物理研究所北京100080 华南师范大学量子电子学研究所广州510631

给出了六态扩展BB84协议的Breidbart基窃听方案 ,分析并计算了各种截取重发策略下的Alice Eve平均交互信息量和施行QKD标准纠错手续后的有效平均交互信息量 ,结果显示Breidbart基窃听 Breidbart基重发策略 (B B策略 )最为有效 .考虑到... 详细信息

给出了六态扩展BB84协议的Breidbart基窃听方案 ,分析并计算了各种截取重发策略下的Alice Eve平均交互信息量和施行QKD标准纠错手续后的有效平均交互信息量 ,结果显示Breidbart基窃听 Breidbart基重发策略 (B B策略 )最为有效 .考虑到Alice和Bob可以在公开讨论阶段利用废弃数据检验是否存在B B窃听以降低秘密性增强算法的强度 ,减少量子密钥的损失 ,提出了修改BB84协议的建议 .

关键词：量子密码 BB84协议 Breidbart基窃听量子密钥分配 QKD

INTEGRAL DISTINGUISHERS OF JH AND GRSTL-512

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Journal of Electronics(china) 2012年第Z1期 94-102页

作者： li Yanjun wu Wenling Dong Le (state key laboratory of information security,institute of software,chinese academy of sciences,beijing 100190,china) (Graduate University of chinese academy of sciences,beijing 100049,china) (beijing Electronic Science and Technology institute,beijing 100070,china)

In December of 2010 NIST selected five SHA-3 finalists-BLAKE,Grstl,JH,Keccak,and Skein to advance to the third (and final) round of the SHA-3 *** present most specialists and scholars focus on the design and the attacks on these hash ***,it is very significant to study some properties of their primitives and underlying *** some properties reflect the pseudo-randomness of the ***,they help us to find new cryptanalysis for some block cipher *** this paper,we analyze the resistance of JH and Grstl-512 against structural properties built on integral *** then 31.5 (out of 42) rounds integral distinguishers for JH compression function and 11.5 (out of 14) rounds for Grstl-512 compression function are presented.

关键词： Hash function SHA-3 candidates Integral distinguisher JH Grstl

Portable fluorogenic probe for monitoring of volatile amine vapour and food spoilage

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chinese Chemical Letters 2024年第3期35卷 257-261页

作者： Jian-Hao Zhao Wen-Xing Xu Bin li Wei Xu wu-Kun Zhang Ming-Shuai Yuan hui-Zi li Qing-Guo He Xiang Ma Jian-Gong Cheng Yan-Yan Fu state key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of the Chinese Academy of SciencesBeijing 100039China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China key laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

There are urgent needs of volatile amine gas sensors with high-performance in food quality control,disease monitoring and environmental ***-film fluorescent probe is suitable for amine vapour sensing due to its high sensitivity,high selectivity,and no polluting ***,a novel fluorescent probe based on indacenodithiophene structure withπconjugated system was designed and *** experimental results show that the films prepared by this material exhibit rapid and distinct fluorescence quenching after being exposed to saturated vapours of primary amine,secondary amine and tertiary amine represented by n-propylamine,diethylamine and trimethylamine,*** quenching of fluorescence is 84%,87%and 96%,respectively,within 10 *** detection mechanism of probe for primary amine is based on specific chemical reaction,while the detection mechanism for secondary amine and tertiary amine is intramolecular charge *** experiments show that the detection limit of the fluorescent probe for trimethylamine,an important marker of food spoilage,could reach 4.610 ***-site detection based on spoilage of small yellow croaker suggests the material possesses the potential for food freshness *** simple fluorogenic probe is an original approach to simplify real-time visual monitoring of volatile amine vapour.

关键词： Fluorescent probe Volatile amine Gas sensing Trimethylamine Food spoilage

Secure Beamforming Design for SWIPT in Cooperative D2D Communications

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china Communications 2017年第1期14卷 20-33页

作者： li Jiang Cheng Qin Xixi Zhang hui Tian state key laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunicationsand Science and Technology on Information Transmission and Dissemination in Communication Networks LaboratoryBeijing100876China

In device-to-device(D2D) communications, device terminal relaying makes it possible for devices in a network to function as transmission relays for each other to enhance the spectral efficiency. In this paper we consider a cooperative D2D communication system with simultaneous wireless information and power transfer(SWIPT). The cooperative D2D communication scheme allows two nearby devices to communicate with each other in the licensed cellular bandwidth by assigning D2D transmitters as half-duplex(HD) relay to assists cellular downlink transmissions. In particular, we focus on secure information transmission for the cellular users when the idle D2D users are the potential eavesdroppers. We aim to design secure beamforming schemes to maximize the D2D users data rate while guaranteeing the secrecy rate requirements of the cellular users and the minimum required amounts of power transferred to the idle D2D users. To solve this non-convex problem, a semi-definite programming relaxation(SDR) approach is adopted to obtain the optimal solution. Furthermore, we propose two suboptimal secure beamforming schemes with low computational complexity for providing secure communication and efficient energy transfer. Simulation results demonstrate the superiority of our proposed scheme.

关键词： device-to-device(D2D) communications half-duplex relaying physical layer security secure beamforming simultaneous wireless information and power transfer

Provably Secure and Efficient Proxy Signature with Untrustworthy Proxy Signer

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Journal of Shanghai Jiaotong university(Science) 2008年第6期13卷 675-678页

作者：王志伟郑世慧王励成杨义先胡正名 information security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Post and TelecommunicationsBeijing 100876China

Proxy signature has drawn great concerns. However, there still remains a challenge to construct a provably secure and efficient proxy signature scheme. In this paper, we propose an efficient proxy signature scheme based on factoring, and prove that it is secure in the random oracle. Furthermore, we present a new type of proxy signature, called Proxy Signature with Untrustworthy Proxy Signer, and construct a concrete scheme.

关键词： proxy signature factoring untrustworthy proxy signer

Data-enhanced revealing of trends in Geoscience

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Journal of Data and information Science 2024年第3期9卷 29-43页

作者： Yu Zhao Meng Wang Jiaxin Ding Jiexing Qi Lyuwen wu Sibo Zhang Luoyi Fu Xinbing Wang li Cheng School of Earth sciences and Resources China University of GeosciencesBeijing 100083China key laboratory of Ecological security and Sustainable Development of Arid Areas State Key Laboratory of Desert and Oasis EcologyChinese Academy of SciencesUrumqiXinjiang830011China Xinjiang key laboratory of Mineral Resources and Digital Geology Urumqi 830011China Shanghai Jiao Tong University Shanghai 200240China Journal Center China University of GeosciencesBeijing 100083China

Purpose:This article presents an in-depth analysis of global research trends in Geosciences from 2014 to *** integrating bibliometric analysis with expert insights from the Deep-time Digital Earth(DDE)initiative,this article identifies key emerging themes shaping the landscape of Earth sciences①.Design/methodology/approach:The identification process involved a meticulous analysis of over 400,000 papers from 466 Geosciences journals and approximately 5,800 papers from 93 interdisciplinary journals sourced from the Web of Science and Dimensions *** map relationships between articles,citation networks were constructed,and spectral clustering algorithms were then employed to identify groups of related research,resulting in 407 *** research terms were extracted using the Log-likelihood Ratio(LLR)algorithm,followed by statistical analyses on the volume of papers,average publication year,and average citation count within each ***,expert knowledge from DDE Scientific Committee was utilized to select top 30 trends based on their representation,relevance,and impact within Geosciences,and finalize naming of these top trends with consideration of the content and implications of the associated *** comprehensive approach in systematically delineating and characterizing the trends in a way which is understandable to ***:Thirty significant trends were identified in the field of Geosciences,spanning five domains:deep space,deep time,deep Earth,habitable Earth,and big *** topics reflect the latest trends and advancements in Geosciences and have the potential to address real-world problems that are closely related to society,science,and *** limitations:The analyzed data of this study only contain those were included in the Web of *** implications:This study will strongly support the organizations and individual scientists to understand the modern frontier of earth science,espec

关键词： Geosciences Research trends Bibliometrics Expert knowledge Global voting

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随机散列函数安全性与签名者作弊

通信学报 2008年第10期29卷 101-107页

作者：李志敏王励成郑世慧杨义先北京邮电大学网络与交换技术国家重点实验室信息安全中心

现有对抗碰撞散列函数的攻击,严重威胁到先'散列'再'签名'的签名算法的安全性。使用随机散列构造RMX来构造此类签名算法的安全性可以不依赖于底层散列函数的离线碰撞稳固性,但前提必须假设签名者不作弊。通过改变随机数的选取方式以及... 详细信息

现有对抗碰撞散列函数的攻击,严重威胁到先'散列'再'签名'的签名算法的安全性。使用随机散列构造RMX来构造此类签名算法的安全性可以不依赖于底层散列函数的离线碰撞稳固性,但前提必须假设签名者不作弊。通过改变随机数的选取方式以及增加消息提供者的签名验证对使用RMX算法的签名算法进行了改进,改进后的算法不需要再假定签名者是诚实的。此外,对Halevi等人提出的随机函数构造rc(M)=Hc(r|■rc(M))的安全性进行了研究,并给出了关于该构造的一个安全紧规约。

关键词：散列函数先“散列”再“签名”的数字签名算法随机散列法 RMX