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End-To-End Encryption Enabled Lightweight Mutual Authentication Scheme for Resource Constrained IoT Network

computers, Materials & Continua 2025年第2期82卷 3223-3249页

作者： Shafi Ullah Haidawati Muhammad Nasir Kushsairy Kadir Akbar Khan Ahsanullah Memon Shanila Azhar Ilyas Khan Muhammad Ashraf Department of Computer Engineering Balochistan University of Information TechnologyEngineering and Management SciencesQuetta87300Pakistan Computer Engineering Section Malaysian Institute of Technology Universiti Kuala LumpurKuala Lumpur50250Malaysia Electrical Engineering Section Universiti Kuala LumpurBritish Malaysian InstituteSalengor53100Malaysia Electrical Engineering Department Mehran UniversityKhairpur-Mirs76062Pakistan Department of Mathematics College of Science Al-ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia

Machine-to-machine (M2M) communication networks consist of resource-constrained autonomous devices, also known as autonomous Internet of things (IoTs) or machine-type communication devices (MTCDs) which act as a backbone for Industrial IoT, smart cities, and other autonomous systems. Due to the limited computing and memory capacity, these devices cannot maintain strong security if conventional security methods are applied such as heavy encryption. This article proposed a novel lightweight mutual authentication scheme including elliptic curve cryptography (ECC) driven end-to-end encryption through curve25519 such as (i): efficient end-to-end encrypted communication with pre-calculation strategy using curve25519;and (ii): elliptic curve Diffie-Hellman (ECDH) based mutual authentication technique through a novel lightweight hash function. The proposed scheme attempts to efficiently counter all known perception layer security threats. Moreover, the pre-calculated key generation strategy resulted in cost-effective encryption with 192-bit curve security. It showed comparative efficiency in key strength, and curve strength compared with similar authentication schemes in terms of computational and memory cost, communication performance and encryption robustness.

关键词： Mutual authentication lightweight end-to-end encryption elliptic curve cryptography industrial internet of things curve25519 machine-to-machine communication

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Text-independent speaker identification system using discrete wavelet transform with linear prediction coding

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Journal of Umm Al-Qura University for engineering and Architecture 2024年第2期15卷 112-119页

作者： Alrusaini, Othman Daqrouq, Khaled Department of Engineering and Applied Sciences Applied College Umm Al-Qura University Makkah 24382 Saudi Arabia Department of Electrical and Computer Engineering King Abdulaziz University Jeddah 21589 Saudi Arabia

One of the key problems of the modern day is the presentation of an identity verification system that can perform sufficient accuracy in identity verification, is resilient to assaults and noises, and can be recorded in the simplest possible method. In this study, a new speaker feature extraction which based on discrete wavelet transform (DWT) and linear prediction coding (LPC) algorithm (WLPCA) are investigated. This paper's primary objective is to evidence the performance of the new method for speaker identification by a Gaussian mixture model (GMM). The proposed method improves the recognition rate over the Mel-frequency cepstral coefficient (MFCC). Experimental evaluation of the process performance is performed on two speech databases;our recorded database and the publicly available TIMIT database. We show that the speech features derived by the newly proposed method are more suitable for GMM (91.53%), in terms of the time-consumed, by requiring less Gaussian mixtures than MFCC (85.77%). For testing the presented method in a noisy environment, Additive white Gaussian noise (AWGN) was added to the TIMIT database, where a slight improvement in the performance of the presented method (60.02%) over the MFCC (59.89%) was observed. © The Author(s) 2024.

关键词： Gaussian mixture model Linear prediction coding Speech Text-independent Wavelet

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High probability convergence bounds for non-convex stochastic gradient descent with sub-weibull noise

The Journal of Machine Learning Research

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The Journal of Machine Learning Research 2024年第1期25卷 11648-11683页

作者： Liam Madden Stephen Becker Department of Electrical and Computer Engineering University of British Columbia Department of Applied Mathematics University of Colorado Boulder

Stochastic gradient descent is one of the most common iterative algorithms used in machine learning and its convergence analysis is a rich area of research. Understanding its convergence properties can help inform what modifications of it to use in different settings. However, most theoretical results either assume convexity or only provide convergence results in mean. This paper, on the other hand, proves convergence bounds in high probability without assuming convexity. Assuming strong smoothness, we prove high probability convergence bounds in two settings: (1) assuming the Polyak- Lojasiewicz inequality and norm sub-Gaussian gradient noise and (2) assuming norm sub-Weibull gradient noise. In the second setting, as an intermediate step to proving convergence, we prove a sub-Weibull martingale difference sequence self-normalized concentration inequality of independent interest. It extends Freedman-type concentration beyond the sub-exponential threshold to heavier-tailed martingale difference sequences. We also provide a post-processing method that picks a single iterate with a provable convergence guarantee as opposed to the usual bound for the unknown best iterate. Our convergence result for sub-Weibull noise extends the regime where stochastic gradient descent has equal or better convergence guarantees than stochastic gradient descent with modifications such as clipping, momentum, and normalization.

关键词： stochastic gradient descent convergence bounds sub-Weibull distributions Polyak-Lojasiewicz inequality freedman inequality

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Assessing the Circuit Requirements for a Real-Time Spectrum Analyzer on 65-nm CMOS Technology 37

Assessing the Circuit Requirements for a Real-Time Spectrum ...

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37th IEEE International System-on-Chip Conference, SOCC 2024

作者： Hotkani, Mojgan Mirzaei Bousquet, Jean-Francois Martin, Bruce Malekshahi, Ehsan Dalhousie University Department of Electrical and Computer Engineering Halifax Canada Jasco Applied Sciences Dartmouth Canada

ISBN: (纸本)9798350377569

This paper presents a detailed investigation into the development and assessment of a real-time spectrum analyzer implemented on a 65-nm CMOS Technology Application-Specific Integrated Circuit (ASIC). The analyzer features a developed Fast Fourier Transform (FFT) algorithm designed for optimal energy efficiency and minimal area usage, with a structured architecture for low, middle, and high-frequency ranges. Operating at a clock frequency of 14 MHz, the signal is sampled at 65536 Hz to produce a wideband power spectral density represented on a logarithmic scale. Integration with an ADS8881 ADC ensures high-fidelity input, and the output is transmitted to a host computer via a Serial Peripheral Interface (SPI). The study includes detailed evaluations through pre-synthesis simulation, post-synthesis simulation, and practical implementation on a Nexys4 FPGA board. The proposed FFT algorithm undergoes rigorous simulation at various synthesis stages, providing a nuanced performance analysis. Practical functionality is assessed on the FPGA, offering insights into the behavior of the circuit. The paper also discusses comprehensively the system's power consumption and calculates the maximum area utilization for the 65-nm CMOS technology, providing essential metrics for optimizing power efficiency and physical footprint. © 2024 IEEE.

关键词： CMOS integrated circuits

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Generic model of metadata management system for data lakes

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International Journal of Metadata, Semantics and Ontologies 2023年第4期16卷 315-328页

作者： Elkina, Hamza Sahib, Mohamed Rida Zaki, Taher Department of Computer Engineering and Intelligent Systems Laboratory of Innovation in Mathematics and Intelligent Systems Faculty of Applied Sciences Ibnou Zohr University Agadir Morocco

Data lake metadata management is crucial for clearly describing stored data and ensuring efficient search query results, especially for semi-structured and unstructured data. Moreover, high-quality metadata provides the necessary information for decision-making. Therefore, we propose a new approach called Metadata Management for Data Lakes (MMDL) based on metadata quality and classification. Additionally, we introduce a generic model adapted to the context of a data lake by including data lake zones to identify data location during its lifecycle. The model aligns with the proposed approach and enables the handling of metrics used to evaluate metadata quality and metadata sources for provenance classification. Copyright © 2023 Inderscience Enterprises Ltd.

关键词： Data quality

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Secrecy Rate Threshold VS. An Optimum Power Splitting Factor Using Beamforming Technique in PHY Layer Security for MU-MIMO Systems 3

Secrecy Rate Threshold VS. An Optimum Power Splitting Factor...

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3rd IEEE International Maghreb Meeting of the Conference on Sciences and Techniques of Automatic Control and computer engineering, MI-STA 2023

作者： Elhoula, Abeer A S Abousetta, Marai M. Ghmati, Tarek Saleh M. Libyan Academy School of Applied Science and Engineering Department of Electrical and Computer Engineering Libya Elemrgib University Al-Graboulli Faculty of Engineering Department of Electrical and Computer Engineering Libya

ISBN: (纸本)9798350319897

This paper describes a new approach to the problem of interception of wireless communication channels between the legitimate users. Physical PHY Layer Security (PLS) is new topic enhancing the secrecy performance of a Multi-User Multiple-Input-Multiple-Output (MU-MIMO) system for wireless communication from a single base-station to many users. Beamforming techniques such as "Pre-Maximum Ratio Combining (P-MRC) and Pre-Equal Gain Combining (P-EGC)"with assumption of perfect Channel State Information CSI is considered in order to achieve the perfect secure transmission between legitimate users. Along with beamforming, Artificial Noise (AN) is a technology that is being studied. The plotted achievable worst-case of secrecy rate down to the best secrecy rate value (threshold of secrecy rate) versus the power allocation fractions (The power splitting factor). The achieved threshold of secrecy rates for the implemented MU-MIMO were used by Matched Filter (MF) beamforming schemes (P-MRC) and (P-EGC) and suggested that the (P-MRC) is considered as an optimal beamforming technique in order to achieve a best secrecy rate or best threshold of secrecy rate for a nearest Information User (IU) to the Eavesdropper Eve. © 2023 IEEE.

关键词： Beamforming

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On Error-Based Step Size Control for Discontinuous Galerkin Methods for Compressible Fluid Dynamics

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应用数学与计算数学学报 2025年第1期7卷 3-39页

作者： Hendrik Ranocha Andrew R.Winters Hugo Guillermo Castro Lisandro Dalcin Michael Schlottke-Lakemper Gregor J.Gassner Matteo Parsani Applied Mathematics University of HamburgBundesstr.5520146 HamburgGermany Department of Mathematics Applied Mathematics Linköping UniversityLinköpingSweden Extreme Computing Research Center(ECRC) Computer Electrical and Mathematical Science and Engineering Division(CEMSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Applied and Computational Mathematics RWTH Aachen UniversityAachenGermany High-Performance Computing Center Stuttgart University of StuttgartStuttgartGermany Department of Mathematics and Computer Science University of CologneCologneGermany Center for Data and Simulation Science University of CologneCologneGermany Extreme Computing Research Center(ECRC) Computer Electrical and Mathematical Science and Engineering Division(CEMSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Physical Science and Engineering Division(PSE) King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

We study a temporal step size control of explicit Runge-Kutta(RK)methods for com-pressible computational fluid dynamics(CFD),including the Navier-Stokes equations and hyperbolic systems of conservation laws such as the Euler *** demonstrate that error-based approaches are convenient in a wide range of applications and compare them to more classical step size control based on a Courant-Friedrichs-Lewy(CFL)*** numerical examples show that the error-based step size control is easy to use,robust,and efficient,e.g.,for(initial)transient periods,complex geometries,nonlinear shock captur-ing approaches,and schemes that use nonlinear entropy *** demonstrate these properties for problems ranging from well-understood academic test cases to industrially relevant large-scale computations with two disjoint code bases,the open source Julia pack-ages *** with *** and the C/Fortran code SSDC based on PETSc.

关键词： Explicit Runge-Kutta(RK)methods Step size control Compressible fluid dynamics Adaptivity in space and time Shock capturing

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Asset Management Strategies for District Heating Networks 8

Asset Management Strategies for District Heating Networks

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8th International Conference on System Reliability and Safety, ICSRS 2024

作者： Grønberg, Jens Tahavori, Maryamsadat Bacher, Peder Dtu Engineering Technology Ballerup Denmark Dtu Department of Applied Mathematics and Computer Science Kongens Lyngby Denmark

ISBN: (纸本)9798350354508

District Heating (DH) became widely adopted in European cities during the 20th century to meet demand for heating from a growing urban population. Today, the desire to decarbonize Europe's heat consumption has lead to an renewed interest in increasing the adoption of DH. To meet this end, DH has to be a price competitive alternative to other heating technologies. Over time the underground heat distribution network that DH companies operate suffers from faults that require replacement of pipes. On-demand replacement is more expensive than planned large scale replacement projects. The only question is, when is the optimal time to renew the pipes? In this article this question will be formulated using Reliability Theory. Our approach is to use historical records of time to failure and a bounding result to estimate the optimal time for replacement. The method can be used by DH companies with historical fault records to form an Asset Management strategy on the question of when to renew which pipes. © 2024 IEEE.

关键词： Asset management

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Some Results on Ricci-Yamabe Soliton and Its Cosmological Models

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IAENG International Journal of applied mathematics 2025年第4期55卷 979-983页

作者： Pandey, Pankaj Yadav, Santosh Kumar Sharma, Kamakshi Chaturvedi, Braj Bhushan Department of Mathematics School of Chemical Engineering and Physical Sciences Lovely Professional University Punjab Phagwara144411 India Department of Mathematics School of Computer Science & Artificial Intelligence SR University Telangana Warangal506371 India Department of Pure & Applied Mathematics Guru Ghasidas Vishwavidyalaya Chhattisgarh Bilaspur495009 India

This article aims to investigate the characteristics of Ricci-Yamabe Soliton (briefly: (RYS)n). We study the cosmological models on (RYS)4 under Lorentzian para Sasakian (LPS)4 spacetime. Parallel Ricci tensor, Poisson structure and gradient property also reveal on (RYS)n. Example of (RYS)4 constructed to verify the results. © (2025), (International Association of Engineers). All rights reserved.

关键词： Solitons

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Robust H∞ switched control for uncertain linear systems via chattering free static output feedback∗ 63

Robust H∞ switched control for uncertain linear systems via...

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63rd IEEE Conference on Decision and Control, CDC 2024

作者： Faria, Flavio A. Elias, Leandro J. Cardim, Rodrigo Oncoy, Dante J. S. Oliveira, Vilma A. Department of Mathematics School of Engineering Ilha Solteira Brazil Education Department Araraquara Brazil Department of Electrical Engineering School of Engineering Ilha Solteira Brazil Department of Electrical and Computer Engineering São Carlos Brazil

ISBN: (纸本)9798350316339

This work proposes a switched control strategy to attenuate the effect of L2 type disturbances on the output performance of uncertain linear systems. The switched controller improves the control performance and reduces the conservatism of existing solutions. Stabilization conditions are given in terms of LMIs which are designed such that the proposed solution guarantees an H∞ cost and be free of chattering. The efficiency of the stabilizing conditions are evaluated by numerical examples. © 2024 IEEE.

关键词： Linear control systems

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