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Cryptanalysis of a Key Exchange Protocol Based on Commuting Matrices

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Chinese Journal of Electronics 2017年第5期26卷 947-951页

作者： jia jianwei LIU Jinhui ZHANG Huanguo Computer School of Wuhan University Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education

A key exchange protocol is considered unsafe.The scheme is based on a set of m commuting square singular matrices of dimension n×n over a finite field,and its security is claimed to rely on the hardness of the matrix version discrete logarithm problem.However,the proposal’s design allows for a clean attack strategy.We show that the key exchange protocol is vulnerable to a linear algebra attack which only requires polynomial time to obtain the equivalent keys for all given public keys.We conduct a detailed analysis on the attack method and provide some improved suggestions on the key exchange protocol based on commuting matrices.

关键词： Cryptography Key exchange protocol Cryptanalysis Discrete logarithm problem Linear equations

A public key cryptosystem based on data complexity under quantum environment

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Science China(Information Sciences) 2015年第11期58卷 48-58页

作者： WU WanQing ZHANG HuanGuo WANG HouZhen MAO ShaoWu jia jianwei LIU JinHui Computer School Wuhan University

Since the Shor algorithm showed that a quantum algorithm can efficiently calculate discrete logarithms and factorize integers, it has been used to break the RSA, EIGamal, and ECC classical public key cryptosystems. This is therefore a significant issue in the context of ensuring communication security over insecure channels. In this paper, we prove that there are no polynomial-size quantum circuits that can compute all Boolean functions(of which there are 22ncases) in the standard quantum oracle model. Based on this,we propose the notion of data complexity under a quantum environment and suggest that it can be used as a condition for post-quantum computation. It is generally believed that NP-complete problems cannot be solved in polynomial time even with quantum computers. Therefore, a public key cryptosystem and signature scheme based on the difficulty of NP-complete problems and the notion of data complexity are presented here. Finally,we analyze the security of the proposed encryption and signature schemes.

关键词： public key cryptography information security NP-complete problem complexity theory quantum computation

Cryptanalysis of Schemes Based on Pseudoinverse Matrix

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Wuhan University Journal of Natural Sciences 2016年第3期21卷 209-213页

作者： LIU Jinhui ZHANG Huanguo jia jianwei School of Computer Wuhan University Wuhan 430072Hubei China Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education Wuhan 430072 Hubei China

Advances in quantum computation threaten to break public key eryptosystems that are based on the difficulty of fac- torization or the difficulty of discrete logariths, although , no quantum algorithms have been found to be able to solve certain mathematical problems on non-commutative algebraic structures up to now. The proposed new quasi-inverse based cryptography scheme is vulnerable to a linear algebra attack based on the probable occurrence of weak keys in the generation process. In this paper, we illustrate that two of the quasi-inverse based cryptography are vulnerable to a structural attack and that it only requires polynomial time to obtain the equivalent keys for some given public keys. In addition, we conduct a detailed analysis on attack methods and provide some improved suggestions on these two schemes.

关键词： cryptography post-quantum computational cryptography key exchange protocol cryptanalysis matrix decomposition

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多道撑式深基坑垮塌事故连续破坏机理研究

土木工程学报 2024年第3期57卷 102-109页

作者：程雪松裴昊田衣凡赵璟璋俞丹瑶刘晓敏贾建伟焦莹天津大学滨海土木工程结构与安全教育部重点实验室天津300072 天津大学建筑工程学院天津300072 中国建筑第六工程局有限公司天津300457

随着城市地铁建设不断发展,多道撑式深基坑应用日益广泛,然而目前对于内撑式深基坑局部破坏引发连续破坏在空间上的传递规律仍缺乏系统研究。文章依托新加坡地铁Nicoll Highway基坑事故,建立三维有限差分模型,提出内支撑荷载传递百分比S... 详细信息

随着城市地铁建设不断发展,多道撑式深基坑应用日益广泛,然而目前对于内撑式深基坑局部破坏引发连续破坏在空间上的传递规律仍缺乏系统研究。文章依托新加坡地铁Nicoll Highway基坑事故,建立三维有限差分模型,提出内支撑荷载传递百分比S1,i和荷载增量承担百分比S2,i两种支撑荷载(轴力)传递评价指标。对比分析了单位厚度平面应变模型与三维模型的模拟结果,探究了不同初始破坏支撑数量在不同位置发生初始破坏所引发的荷载重分布规律,同时还研究了围护结构体系刚度和强度对于连续破坏发展的影响。结果表明,三维模型可以避免平面应变模型传力路径单一的局限性,更好地反映出连续破坏在三维空间中的传递现象;初始破坏支撑所释放的荷载主要作用在紧邻层支撑;当失效荷载存在向下的传递路径时,紧邻初始破坏的上层和同层支撑承担的荷载增量明显减少;底层支撑的安全系数提高会减缓连续破坏在水平方向的发展;支撑刚度越大,在初始破坏后所承担的荷载增量越多;当墙体间无有效连接时,支撑连续破坏沿竖直方向发展的趋势更加显著。

关键词：深基坑内支撑有限差分模型连续破坏荷载传递

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成人吸入性一氧化氮治疗及其临床应用进展

国际呼吸杂志 2024年第1期44卷 110-114页

作者：丁悦加贾建伟葛慧青浙江大学医学院附属邵逸夫医院呼吸治疗科杭州310016

一氧化氮是血管内皮细胞产生的天然血管扩张因子。目前吸入性一氧化氮(iNO)已获批用于新生儿持续性肺动脉高压治疗,而对于成人患者,iNO治疗已在右心导管术期间急性肺血管反应试验中被证实有明确作用。近年来随着对iNO研究的深入,更多的... 详细信息

一氧化氮是血管内皮细胞产生的天然血管扩张因子。目前吸入性一氧化氮(iNO)已获批用于新生儿持续性肺动脉高压治疗,而对于成人患者,iNO治疗已在右心导管术期间急性肺血管反应试验中被证实有明确作用。近年来随着对iNO研究的深入,更多的疾病能从iNO治疗中获益。本文就iNO的作用机制及其相关临床应用进展作一综述,以进一步加深对iNO的生理效应及其在成人中临床应用效果的了解。

关键词：一氧化氮吸入性一氧化氮血管扩张因子生理效应临床应用

Machine Learning Security Defense Algorithms Based on Metadata Correlation Features

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Computers, Materials & Continua 2024年第2期78卷 2391-2418页

作者： Ruchun jia jianwei Zhang Yi Lin College of Computer Science Sichuan UniversityChengdu610065China

With the popularization of the Internet and the development of technology,cyber threats are increasing day by day.Threats such as malware,hacking,and data breaches have had a serious impact on cybersecurity.The network security environment in the era of big data presents the characteristics of large amounts of data,high diversity,and high real-time requirements.Traditional security defense methods and tools have been unable to cope with the complex and changing network security threats.This paper proposes a machine-learning security defense algorithm based on metadata association features.Emphasize control over unauthorized users through privacy,integrity,and availability.The user model is established and the mapping between the user model and the metadata of the data source is generated.By analyzing the user model and its corresponding mapping relationship,the query of the user model can be decomposed into the query of various heterogeneous data sources,and the integration of heterogeneous data sources based on the metadata association characteristics can be realized.Define and classify customer information,automatically identify and perceive sensitive data,build a behavior audit and analysis platform,analyze user behavior trajectories,and complete the construction of a machine learning customer information security defense system.The experimental results show that when the data volume is 5×103 bit,the data storage integrity of the proposed method is 92%.The data accuracy is 98%,and the success rate of data intrusion is only 2.6%.It can be concluded that the data storage method in this paper is safe,the data accuracy is always at a high level,and the data disaster recovery performance is good.This method can effectively resist data intrusion and has high air traffic control security.It can not only detect all viruses in user data storage,but also realize integrated virus processing,and further optimize the security defense effect of user big data.

关键词： Data-oriented architecture metadata correlation features machine learning security defense data source integration

Cluster DetectionMethod of Endogenous Security Abnormal Attack Behavior in Air Traffic Control Network

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Computers, Materials & Continua 2024年第5期79卷 2523-2546页

作者： Ruchun jia jianwei Zhang Yi Lin Yunxiang Han Feike Yang College of Computer Science Sichuan UniversityChengdu610065China Equipment Management and Unmanned Aerial Vehicle College of Air Force Engineering University Air Force Engineering UniversityXi’an710051China

In order to enhance the accuracy of Air Traffic Control(ATC)cybersecurity attack detection,in this paper,a new clustering detection method is designed for air traffic control network security attacks.The feature set for ATC cybersecurity attacks is constructed by setting the feature states,adding recursive features,and determining the feature criticality.The expected information gain and entropy of the feature data are computed to determine the information gain of the feature data and reduce the interference of similar feature data.An autoencoder is introduced into the AI(artificial intelligence)algorithm to encode and decode the characteristics of ATC network security attack behavior to reduce the dimensionality of the ATC network security attack behavior data.Based on the above processing,an unsupervised learning algorithm for clustering detection of ATC network security attacks is designed.First,determine the distance between the clustering clusters of ATC network security attack behavior characteristics,calculate the clustering threshold,and construct the initial clustering center.Then,the new average value of all feature objects in each cluster is recalculated as the new cluster center.Second,it traverses all objects in a cluster of ATC network security attack behavior feature data.Finally,the cluster detection of ATC network security attack behavior is completed by the computation of objective functions.The experiment took three groups of experimental attack behavior data sets as the test object,and took the detection rate,false detection rate and recall rate as the test indicators,and selected three similar methods for comparative test.The experimental results show that the detection rate of this method is about 98%,the false positive rate is below 1%,and the recall rate is above 97%.Research shows that this method can improve the detection performance of security attacks in air traffic control network.

关键词： Air traffic control network security attack behavior cluster detection behavioral characteristics information gain cluster threshold automatic encoder

Nonvolatile and reconfigurable two-terminal electro-optic duplex memristor based on III-nitride semiconductors

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Light(Science & Applications) 2024年第4期13卷 706-716页

作者： Zhiwei Xie Ke jiang Shanli Zhang jianwei Ben Mingrui Liu Shunpeng Lv Yang Chen Yuping jia Xiaojuan Sun Dabing Li State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesDongnanhu Road No.3888Changchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesYuquan Road No.19100049 BeijingChina These authors contributed equally:Zhiwei XieKe Jiang

With the fast development of artificial intelligence(AI),Internet of things(IOT),etc,there is an urgent need for the technology that can efficiently recognize,store and process a staggering amount of information.The AlScN material has unique advantages including immense remnant polarization,superior temperature stability and good latticematch to other III-nitrides,making it easy to integrate with the existing advanced III-nitrides material and device technologies.However,due to the large band-gap,strong coercive field,and low photo-generated carrier generation and separation efficiency,it is difficult for AlScN itself to accumulate enough photo-generated carriers at the surface/interface to induce polarization inversion,limiting its application in in-memory sensing and computing.In this work,an electro-optic duplex memristor on a GaN/AlScN hetero-structure based Schottky diode has been realized.This twoterminal memristor shows good electrical and opto-electrical nonvolatility and reconfigurability.For both electrical and opto-electrical modes,the current on/off ratio can reach the magnitude of 104,and the resistance states can be effectively reset,written and long-termly stored.Based on this device,the“IMP”truth table and the logic“False”can be successfully reproduced,indicating the huge potential of the device in the field of in-memory sensing and computing.

关键词： polarization duplex limiting

Cryptanalysis of Cryptosystems Based on General Linear Group

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China Communications 2016年第6期13卷 217-224页

作者： jianwei jia Jinhui Liu Huanguo Zhang Computer School of Wuhan University WuhanHubei 430072China Key Laboratory of Aerospace Information security and trusted computing Ministry of Education Wuhan UniversityWuhan 430072HubeiProvinceChina

Advances in quantum computers threaten to break public key cryptosystems such as RSA, ECC, and EIGamal on the hardness of factoring or taking a discrete logarithm, while no quantum algorithms are found to solve certain mathematical problems on non-commutative algebraic structures until now. In this background, Majid Khan et al.proposed two novel public-key encryption schemes based on large abelian subgroup of general linear group over a residue ring. In this paper we show that the two schemes are not secure. We present that they are vulnerable to a structural attack and that, it only requires polynomial time complexity to retrieve the message from associated public keys respectively. Then we conduct a detailed analysis on attack methods and show corresponding algorithmic description and efficiency analysis respectively. After that, we propose an improvement assisted to enhance Majid Khan's scheme. In addition, we discuss possible lines of future work.

关键词：一般线性群密码分析公钥密码系统 EIGamal 攻击方法代数结构量子计算机时间复杂度