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Evaluating and Improving Linear Regression Based Profiling:On the Selection of Its Regularization

Journal of Computer Science & Technology 2020年第5期35卷 1175-1197页

作者： xiang-jun lu Chi Zhang Da-Wu Gu jun-Rong Liu Qian Peng Hai-Feng Zhang School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China ZhiXun Crypto Testing and Evaluation Technology Co.Ltd. Shanghai 200240China Department of Microelectronics and Nanoelectronics Tsinghua UniversityBeijing 100084China Beijing Smartchip Microelectronics Technology Co. Ltd.Beijing 100082China

Side-channel attacks(SCAs)play an important role in the security evaluation of cryptographic *** a form of SCAs,profiled differential power analysis(DPA)is among the most powerful and efficient by taking advantage of a profiling phase that learns features from a controlled *** regression(LR)based profiling,a special profiling method proposed by Schindler et al.,could be extended to generic-emulating DPA(differential power analysis)by on-the-fly *** formal extension was proposed by Whitnall et *** SLR-based ***,to improve SLR-based method,Wang et *** a method based on ridge ***,the constant format of L-2 penalty still limits the performance of *** this paper,we generalize the ridge-based method and propose a new strategy of using variable *** then analyze from a theoretical point of view why we should not use constant penalty format for all *** speaking,our work reveals the underlying mechanism of how different formats affect the profiling process in the context of side ***,by selecting a proper regularization,we could push the limits of LR-based ***,we conduct simulation-based and practical experiments to confirm our ***,the results of our practical experiments show that the proper formats of regularization are different among real devices.

关键词： side-channel attack(SCA) cryptography linear regression based profiling generic-emulating differential power analysis regularization

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Side-Channel Analysis for the Authentication Protocols of CDMA Cellular Networks

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Journal of Computer Science & Technology 2019年第5期34卷 1079-1095页

作者： Chi Zhang jun-Rong Liu Da-Wu Gu Wei-Jia Wang xiang-jun lu Zheng Guo Hai-Ning lu School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China ZhiXun Crypto Testing and Evaluation Technology Co. Ltd.Shanghai 200240China Crypto Group Electrical Engineering DepartmentInstitute of Information and Communication Technologies Catholic University of LouvainLouvain-la-Neuve B-1348Belgium Shanghai Viewsource Information Science and Technology Co. LtdShanghai 200240China

Time-division multiple access (TDMA) and code-division multiple access (CDMA) are two technologies used in digital cellular networks. The authentication protocols of TDMA networks have been proven to be vulnerable to side-channel analysis (SCA), giving rise to a series of powerful SCA-based attacks against unprotected subscriber identity module (SIM) cards. CDMA networks have two authentication protocols, cellular authentication and voice encryption (CAVE) based authentication protocol and authentication and key agreement (AKA) based authentication protocol, which are used in different phases of the networks. However, there has been no SCA attack for these two protocols so far. In this paper, in order to figure out if the authentication protocols of CDMA networks are sufficiently secure against SCA, we investigate the two existing protocols and their cryptographic algorithms. We find the side-channel weaknesses of the two protocols when they are implemented on embedded systems. Based on these weaknesses, we propose specific attack strategies to recover their authentication keys for the two protocols, respectively. We verify our strategies on an 8-bit microcontroller and a real-world SIM card, showing that the authentication keys can be fully recovered within a few minutes with a limited number of power measurements. The successful experiments demonstrate the correctness and the effectiveness of our proposed strategies and prove that the unprotected implementations of the authentication protocols of CDMA networks cannot resist SCA.

关键词： authentication protocol cellular authentication and voice encryption (CAVE) code-division multiple access (CDMA) secure hash algorithm 1 (SHA-1) side-channel analysis

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IDENTIFICATION AND SIMULATION OF X-RAY POWDER DIFFRACTION PATTERN

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Chinese Chemical Letters 1991年第11期2卷 873-876页

作者： Shao Fan LIN xiang jun lu Wei Fan ZHENG Central Laboratory Nankai UniversityTianjin300071

A new method for pattern identification and simulation of X-ray powder diffraction data is described, which can give definite phase composition of the unknown rapidly and correctly. The method is implemented in Micros... 详细信息

关键词： IDENTIFICATION AND SIMULATION OF X-RAY POWDER DIFFRACTION PATTERN

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Side-Channel Analysis for the Re-Keying Protocol of Bluetooth Low Energy

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Journal of Computer Science & Technology 2023年第5期38卷 1132-1148页

作者：曹培张驰陆相君陆海宁谷大武 School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

In the era of the Internet of Things,Bluetooth low energy(BLE/BTLE)plays an important role as a wellknown wireless communication *** the security and privacy of BLE have been analyzed and fixed several times,the threat of side-channel attacks to BLE devices is still not well *** this work,we highlight a side-channel threat to the re-keying protocol of *** protocol uses a fixed long term key for generating session keys,and the leakage of the long term key could render the encryption of all the following(and previous)connections *** attack exploits the side-channel leakage of the re-keying protocol when it is implemented on embedded *** particular,we present successful correlation electromagnetic analysis and deep learning based profiled analysis that recover long term keys of BLE *** evaluate our attack on an ARM Cortex-M4 processor(Nordic Semiconductor nRF52840)running Nimble,a popular open-source BLE *** results demonstrate that the long term key can be recovered within only a small amount of electromagnetic ***,we summarize the features and limitations of our attack,and suggest a range of countermeasures to prevent it.

关键词： Bluetooth low energy(BLE/BTLE) long term key re-keying protocol side-channel analysis

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Microstructure and remarkably improved hydrogen storage properties of Mg_2Ni alloys doped with metal elements of Al, Mn and Ti

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Transactions of Nonferrous Metals Society of China 2018年第12期28卷 2470-2477页

作者： Hai-chang ZHONG Jing-bo XU Chun-hai JIANG xiang-jun lu Fujian Provincial Key Laboratory of Functional Materials and Applications Xiamen University of TechnologyXiamen 361024China School of Materials Science and Engineering Xiamen University of TechnologyXiamen 361024China

Mg2Ni0.7M0.3(M=Al,Mn and Ti)alloys were prepared by solid phase sintering *** phases and microstructure of the alloys were systematically characterized by XRD,SEM and *** was found that Mg3MNi2intermetallic compounds formed in Mg2Ni0.7M0.3alloys and coexisted with Mg and Mg2Ni,and that radius of M atoms closer to that of Mg atom was more beneficial to the formation of *** hydrogen storage properties and corrosion resistance of Mg2Ni0.7M0.3alloys were investigated through Sievert and Tafel ***2Ni0.7M0.3alloys exhibited remarkably improved hydrogen absorption and desorption *** reduced apparent dehydriding activation energy values of-46.12,-59.16and-73.15kJ/mol were achieved for Mg2Ni0.7Al0.3,Mg2Ni0.7Mn0.3and Mg2Ni0.7Ti0.3alloys,*** corrosion potential of Mg2Ni0.7M0.3alloys shifted to the positive position compared with Mg2Ni alloy,*** was a corrosion potential difference of0.110V between Mg2Ni0.7Al0.3alloy(-0.529V)and Mg2Ni(-0.639V),showing improved anti-corrosion properties by the addition of Al,Mn and Ti.

关键词： Mg2Ni Mg3MNi2 hydriding kinetics dehydriding activation energy anti-corrosion properties

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EVAluATION ON ECOLOGICAL ADAPTABILITY AND WEED CONTROL OF SEVEN COVER PLANTS IN CHESTNUT(CASTANEA MOLLISSIA) ORCHARD OF BEIJING

EVALUATION ON ECOLOGICAL ADAPTABILITY AND WEED CONTROL OF SE...

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中国第三届植物化感作用学术研讨会、第八届全国杂草科学大会、联合国粮农组织——中国“水稻化感作用论坛”

作者： xiang-yang lu and jun XU Institute of Plant & Enviromenlal Protection,Beijing Academy of Agricultural and Forestry Science,Beijing 100089,China

Ecological adaptability of 6 cover crops and their effectiveniss of controlling weeds was evaluated in Chestnut(Castanea Mollissia) orchard of Beijing in order to replace herbicide, avoid bare soil,reduce soil erosion by water and increase plant *** repens, Dactylis glomerata,Festuca arundinacea,Lolium perenne,Poa pratensis and Bromus inermis

关键词： CASTANEA MOLLISSIA EVAluATION ON ECOLOGICAL ADAPTABILITY AND WEED CONTROL OF SEVEN COVER PLANTS IN CHESTNUT ORCHARD OF BEIJING

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针刺推拿对痉挛型脑性瘫痪尖足的影响

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中国康复理论与实践 2015年第3期21卷 334-337页

作者：向俊璐周文智田萍杨力杨霞成都市妇女儿童中心医院四川成都市610000

目的观察针刺推拿治疗痉挛型脑瘫尖足的临床疗效。方法纳入的49例患儿按就诊先后顺序分为治疗组(n=24)和对照组(n=25)。对照组接受常规康复训练,治疗组在常规康复训练的同时给予针刺推拿治疗,共3个月。治疗前后采用综合痉挛量表(CSS)和... 详细信息

目的观察针刺推拿治疗痉挛型脑瘫尖足的临床疗效。方法纳入的49例患儿按就诊先后顺序分为治疗组(n=24)和对照组(n=25)。对照组接受常规康复训练,治疗组在常规康复训练的同时给予针刺推拿治疗,共3个月。治疗前后采用综合痉挛量表(CSS)和踝关节被动背屈角度测量进行评定。结果治疗后两组患儿踝关节被动背屈角度、CSS评分结果显著优于治疗前(P<0.001);治疗组显著优于对照组(P<0.001)。治疗组总有效率95.6%,对照组总有效率78.26%(P<0.05)。结论在常规康复训练基础上配合针刺推拿,可更有效改善痉挛型脑瘫尖足。

关键词：脑性瘫痪痉挛型尖足针刺推拿

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浅谈公路路桥施工与管理

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价值工程 2018年第9期37卷 59-60页

作者：项路军武国民山东宇通路桥集团有限公司东营257300

公路路桥施工与管理工作作为一个相互联系、相互依靠的工作系统,在实际促进公路路桥施工与管理工作提升的过程中,能够切实从施工方面促进管理工作的顺利进行,且又能够从管理工作的科学化进行促进施工工作的正常化进行,以此整体上为建设... 详细信息

公路路桥施工与管理工作作为一个相互联系、相互依靠的工作系统,在实际促进公路路桥施工与管理工作提升的过程中,能够切实从施工方面促进管理工作的顺利进行,且又能够从管理工作的科学化进行促进施工工作的正常化进行,以此整体上为建设高质量的公路路桥奠定重要的基础。

关键词：公路路桥施工管理

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Perilipin-2 mediates ferroptosis in oligodendrocyte progenitor cells and myelin injury after ischemic stroke

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Neural Regeneration Research 2025年第7期20卷 2015-2028页

作者： Jian Yang Jiang Wu Xueshun Xie Pengfei Xia Jinxin lu Jiale Liu Lei Bai xiang Li Zhengquan Yu Haiying Li Department of Neurosurgery&Brain and Nerve Research Laboratory The First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina Institute of Stroke Research Soochow UniversitySuzhouJiangsu ProvinceChina

Differentiation of oligodendrocyte progenitor cells into mature myelin-forming oligodendrocytes contributes to *** of remyelination due to oligodendrocyte progenitor cell death can result in severe nerve *** is an iron-dependent form of regulated cell death caused by membrane rupture induced by lipid peroxidation,and plays an important role in the pathological process of ischemic ***,there are few studies on oligodendrocyte progenitor cell *** analyzed transcriptome sequencing data from GEO databases and identified a role of ferroptosis in oligodendrocyte progenitor cell death and myelin injury after cerebral *** analysis suggested that perilipin-2(PLIN2)was involved in oligodendrocyte progenitor cell ***2 is a lipid storage protein and a marker of hypoxia-sensitive lipid droplet *** further investigation,we established a mouse model of cerebral ischemia/*** found significant myelin damage after cerebral ischemia,as well as oligodendrocyte progenitor cell death and increased lipid peroxidation levels around the infarct *** ferroptosis inhibitor,ferrostatin-1,rescued oligodendrocyte progenitor cell death and subsequent myelin *** also found increased PLIN2 levels in the peri-infarct area that co-localized with oligodendrocyte progenitor ***2 knockdown rescued demyelination and improved neurological *** findings suggest that targeting PLIN2 to regulate oligodendrocyte progenitor cell ferroptosis may be a potential therapeutic strategy for rescuing myelin damage after cerebral ischemia.

关键词： bioinformatics bulk RNA sequencing ferroptosis ischemic stroke myelin injury oligodendrocyte progenitor cell perilipin-2 single-cell RNA sequencing

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De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第01期 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka lu Ju-Song Yang Fu-Min Zhang Ai-jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

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