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A New Encryption Mechanism Supporting the Update of Encrypted Data for Secure and Efficient Collaboration in the Cloud Environment

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 813-834页

作者： Chanhyeong Cho Byeori Kim Haehyun Cho Taek-Young Youn department of Cyber security Dankook UniversityYongin16890Republic of Korea department of Software Soongsil UniversitySeoul07027Republic of Korea

With the rise of remote collaboration,the demand for advanced storage and collaboration tools has rapidly ***,traditional collaboration tools primarily rely on access control,leaving data stored on cloud servers vulnerable due to insufficient *** paper introduces a novel mechanism that encrypts data in‘bundle’units,designed to meet the dual requirements of efficiency and security for frequently updated collaborative *** bundle includes updated information,allowing only the updated portions to be reencrypted when changes *** encryption method proposed in this paper addresses the inefficiencies of traditional encryption modes,such as Cipher Block Chaining(CBC)and Counter(CTR),which require decrypting and re-encrypting the entire dataset whenever updates *** proposed method leverages update-specific information embedded within data bundles and metadata that maps the relationship between these bundles and the plaintext *** utilizing this information,the method accurately identifies the modified portions and applies algorithms to selectively re-encrypt only those *** approach significantly enhances the efficiency of data updates while maintaining high performance,particularly in large-scale data *** validate this approach,we conducted experiments measuring execution time as both the size of the modified data and the total dataset size *** show that the proposed method significantly outperforms CBC and CTR modes in execution speed,with greater performance gains as data size ***,our security evaluation confirms that this method provides robust protection against both passive and active attacks.

关键词： Cloud collaboration mode of operation data update efficiency

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Magnetron sputtered nickel oxide with suppressed interfacial defect states for efficient inverted perovskite solar cells

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Journal of Energy Chemistry 2025年第1期100卷 348-355页

作者： Guoqiang Ma Qin Tan Zhaoning Li Jingwei Xiu Jiafeng Wang Tianle Cheng Dong He Qiang Sun Xuhang Ma Francesco Lamberti Zhubing He department of Materials Science and Engineering Institute of Innovative Materials (I2M) Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG)Southern University of Science and Technology (SUSTech) Core Research Facilities Southern University of Science and Technology department of Chemical Sciences Department of Industrial Engineering University of Padova

Widely used spin-coated nickle oxide （NiOx） based perovskite solar cells often suffer from severe interfacial reactions between the NiOxand adjacent perovskite layers due to surface defect states,which inherently impair device performance in a long-term view,even with surface molecule *** this study,we developed high-quality magnetron-sputtered NiOxthin films through detailed process optimization,and compared systematically sputtered and spin-coated NiOxthin film surfaces from materials to *** sputtered NiOxfilms exhibit improved crystallinity,smoother surfaces,and significantly reduced Ni3+or Ni vacancies compared to their spin-coated ***,the interface between the perovskite and sputtered NiOxfilm shows a substantially reduced density of defect *** solar cells （PSCs） fabricated with our optimally sputtered NiOxfilms achieved a high power conversion efficiency （PCE） of up to 19.93%and demonstrated enhanced stability,maintaining 86.2% efficiency during 500 h of maximum power point tracking under one standard sun ***,with the surface modification using (4-(2,7-dibromo-9,9-dimethylacridin-10（9H）-yl)butyl)p hosphonic acid （DMAcPA）,the device PCE was further promoted to 23.07%,which is the highest value reported for sputtered NiOxbased PSCs so far.

关键词： Nickle oxide Magnetron sputter Defect Stability Perovskite solar cell

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A novel solution treatment and aging for powder bed fusion-laser beam Ti-6Al-2Sn-4Zr-6Mo alloy:Microstructural and mechanical characterization

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 414-424页

作者： Gianluca Pirro Alessandra Martucci Alessandro Morri Mariangela Lombardi Lorella Ceschini department of industrial Engineering(DIN) Alma Mater Studiorum-University of BolognaBologna 40136Italy department of Applied Science and Technology(DISAT) Politecnico di TorinoTorino TO 10129Italy

Ti-6Al-4Zr-2Sn-6Mo alloy is one of the most recent titanium alloys processed using powder bed fusion-laser beam(PBF-LB)*** alloy has the potential to replace Ti-6Al-4V in automotive and aerospace applications,given its superior mechanical properties,which are approximately 10%higher in terms of ultimate tensile strength(UTS)and yield strength after appropriate heat *** as-built conditions,the alloy is characterized by the presence of soft orthorhombicα″martensite,necessitating a postprocessing heat treatment to decompose this phase and enhance the mechanical properties of the ***,PBFed Ti6246 components undergo an annealing process that transforms theα″martensite into anα-βlamellar *** primary objective of this research was to develop a solution treatment and aging(STA)heat treatment tailored to the unique microstructure produced by the additive manufacturing process to achieve an ultrafine bilamellar microstructure reinforced by precipitation *** study investigated the effects of various solution temperatures in theα-βfield(ranging from 800 to 875℃),cooling media(air and water),and aging time to determine the optimal heat treatment parameters for achieving the desired bilamellar *** each heat treatment condition,differentα-βmicrostructures were found,varying in terms of theα/βratio and the size of the primaryα-phase *** attention was given to how these factors were influenced by increases in solution temperature and how microhardness correlated with the percentage of the metastableβphase present after *** tests were performed on samples subjected to the most promising heat treatment parameters.A comparison with literature data revealed that the optimized STA treatment enhanced hardness and UTS by13%and 23%,respectively,compared with those of the annealed *** surface analyses were conducted to investigate fracture mechanisms.

关键词： powder bed fusion-laser beam titanium alloys heat treatments mechanical properties fractographic analysis

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Physical Layer security Scheme With AoI-Awareness for industrial IoT Based on Covert Communications

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 276-278页

作者： Yaping Li Zhi-Xin Liu Jia-Wei Su Ya-Zhou Yuan the Key Laboratory of industrial Computer Control Engineering of Hebei Province Yanshan University

Dear Editor,industrial Internet of things(IIoT) is a typical application of cyberphysical system(CPS). In the IIoT, wireless communication is an inevitable trend to replace the deployment-limited wired transmission for cases with large-scale and mobile devices. However, wireless communication gives rise to critical issues related to physical security, such as malicious detections and attacks [1].

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Second Order Fluid Glow Discharge Model Sustained by Different Source Terms

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Plasma Science and Technology 2011年第5期13卷 583-590页

作者： D.GUENDOUZ A.HAMID A.HENNAD Institute of Maintenance and industrial security University of Oran Electrical Engineering department Oran University of Sciences and Technology

Behavior of charged particles in a DC low pressure glow discharge is studied. The electric properties of the glow discharge in argon, maintained by a constant source term with uni- form electron and ion generation, between two plane electrodes or by secondary electron emission at the cathode, are determined. A fluid model is used to solve self-consistently the first three moments of the Boltzmann equation coupled with the Poisson equation. The stationary spatial distribution of the electron and ion densities, the electric potential, the electric field, and the electron energy, in a two-dimensional （2D） configuration, are presented.

关键词： glow discharge Boltzmann equation Poisson equation electron temperature

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XA-GANomaly: An Explainable Adaptive Semi-Supervised Learning Method for Intrusion Detection Using GANomaly

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Computers, Materials & Continua 2023年第7期76卷 221-237页

作者： Yuna Han Hangbae Chang department of security Convergence Graduate SchoolChung-Ang UniversitySeoul06974Korea department of industrial security Chung-Ang UniversitySeoul06974Korea

Intrusion detection involves identifying unauthorized network activity and recognizing whether the data constitute an abnormal network *** research has focused on using semi-supervised learning mechanisms to identify abnormal network traffic to deal with labeled and unlabeled data in the ***,real-time training and classifying network traffic pose challenges,as they can lead to the degradation of the overall dataset and difficulties preventing ***,existing semi-supervised learning research might need to analyze the experimental results *** paper proposes XA-GANomaly,a novel technique for explainable adaptive semi-supervised learning using GANomaly,an image anomalous detection model that dynamically trains small subsets to these ***,this research introduces a deep neural network(DNN)-based GANomaly for semi-supervised ***,this paper presents the proposed adaptive algorithm for the DNN-based GANomaly,which is validated with four subsets of the adaptive ***,this study demonstrates a monitoring system that incorporates three explainable techniques—Shapley additive explanations,reconstruction error visualization,and t-distributed stochastic neighbor embedding—to respond effectively to attacks on traffic data at each feature engineering stage,semi-supervised learning,and adaptive *** to other single-class classification techniques,the proposed DNN-based GANomaly achieves higher scores for Network security Laboratory-Knowledge Discovery in Databases and UNSW-NB15 datasets at 13%and 8%of F1 scores and 4.17%and 11.51%for accuracy,***,experiments of the proposed adaptive learning reveal mostly improved results over the initial *** analysis and monitoring system based on the combination of the three explainable methodologies is also ***,the proposed method has the potential advantages to be applied in practical industry,and future r

关键词： Intrusion detection system(IDS) adaptive learning semi-supervised learning explainable artificial intelligence(XAI) monitoring system

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Blockchain Technology Based Information Classification Management Service

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Computers, Materials & Continua 2021年第5期67卷 1489-1501页

作者： Gi-Wan Hong Jeong-Wook Kim Hangbae Chang department of security Convergence Graduate SchoolChung-Ang UniversitySeoul06974Korea department of industrial security Chung-Ang UniversitySeoul06974Korea

Hyper-connectivity in Industry 4.0 has resulted in not only a rapid increase in the amount of information,but also the expansion of areas and assets to be *** terms of information security,it has led to an enormous economic cost due to the various and numerous security solutions used in protecting the increased ***,it has caused difficulties in managing those issues due to reasons such as mutual interference,countless security events and logs’data,*** this security environment,an organization should identify and classify assets based on the value of data and their security perspective,and then apply appropriate protection measures according to the assets’security classification for effective security *** there are still difficulties stemming from the need to manage numerous security solutions in order to protect the classified *** this paper,we propose an information classification management service based on blockchain,which presents and uses a model of the value of data and the security *** records transactions of classifying assets and managing assets by each class in a distributed ledger of *** proposed service reduces assets to be protected and security solutions to be applied,and provides security measures at the platform level rather than individual security solutions,by using *** the rapidly changing security environment of Industry 4.0,this proposed service enables economic security,provides a new integrated security platform,and demonstrates service value.

关键词： Information classification data integrity document security blockchain CIA

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Implications of fine water mist environment on the post-detonation processes of a PE4 explosive charge in a semi-confined blast chamber

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Defence Technology（防务技术） 2018年第5期14卷 366-372页

作者： Zetu Jiba Tleyane Jonas Sono Frederik Johannes Mostert Council for Scientific and industrial Research (CSIR) Defence Peace Safety and Security

The effects of a fine water mist environment in a semi-confined blast chamber on the chemical and thermodynamic processes following detonation of a 20 g PE4 explosive charge have been *** effects were quantified by the analysis of pressure profiles recorded where several parameters including arrival time of the shock at the sensors, peak overpressures, specific impulse of the positive phase, period of the negative phase and the specific impulse of the multiple reflections were *** effect of the fine water mist on the arrival time, peak pressures and the specific impulse of the positive phase agrees with previous findings in literature. In this paper, the focus is on the implications of the fine water mist on the negative phase and the impulse of multiple pressure reflections. The period of the negative phase was found to have increased by 40% and with higher negative peak pressure in the mist condition compared to the atmospheric condition. The activities of the multiple pressure reflections were found to have decreased considerably, both in number and in amplitude leading to lower impulses(by about 60%) for the water mist conditions.

关键词： Fine water mist Blast mitigation Semi-confined blast chamber Negative phase pressure Multiple pressure reflections

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Challenges in blast protection research

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Defence Technology（防务技术） 2018年第5期14卷 426-432页

作者： F.J.Mostert Defence Peace Safety and Security Council for Scientific and Industrial Research

This paper presents a view of some of the challenges that are presented in investigating protection methodologies against explosive blast effects. In particular, the paper is concerned with experimental efforts that can aid in the understanding of complex blast effects in typical real world scenarios. Current progress in the implementation of blast mitigation methodologies in the landward defence environment is reviewed.

关键词： Explosive blast Protection Mitigation

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WARX: efficient white-box block cipher based on ARX primitives and random MDS matrix

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Science China(Information Sciences) 2022年第3期65卷 196-210页

作者： Jun LIU Vincent RIJMEN Yupu HU Jie CHEN Baocang WANG State Key Laboratory of Integrated Service Networks Xidian University Interuniversity Microelectronics Centre & Computer security and industrial Cryptography Group department of Informatics University of Bergen

White-box cryptography aims to provide secure cryptographic primitives and implementations for the white-box attack model, which assumes that an adversary has full access to the implementation of the cryptographic algorithms. Real-world applications require highly efficient and secure white-box schemes,whereas the existing proposals cannot meet this demand. In this paper, we design a new white-box block cipher based on addition/rotation/XOR(ARX) primitives and random maximal distance separable(MDS)matrix, white-box ARX(WARX), aiming for efficient implementations in both black-and white-box *** implementation of WARX in the black-box model is nine times faster than SPNbox-16 from ASIACRYPT’16, and the implementation in the white-box model is more efficient than SPNbox-16 and WEM from CT-RSA’17. Moreover, the security of WARX in both black-and white-box models is analyzed, which ensures its practical applicability. The design of WARX shows that ARX primitives and random linear layer can improve the efficiency of a white-box block cipher. This article may inspire more provably secure and efficient white-box block ciphers and help to narrow the gap between provably secure white-box schemes from academia and highly applicable schemes in great demand from industry.

关键词： white-box cryptography block cipher design addition/rotation/XOR efficiency improvement

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