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Light-Weighted Decision Support Framework for Selecting cloud service providers

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Computers, Materials & Continua 2023年第2期74卷 4293-4317页

作者： Abdulmajeed Aljuhani Abdulaziz Alhubaishy Mohammad Khalid Imam Rahmani Ahmad A.Alzahrani College of Computer Science and Engineering Taibah UniversityMedina41411Saudi Arabia College of Computing and Informatics Saudi Electronic UniversityRiyadh11673Saudi Arabia Computer Science Common First Year DeanshipUmm-AlQura UniversityMakkahMKSaudi Arabia

Multi-criteria decision making(MCDM)is a technique used to achieve better outcomes for some complex business-related problems,whereby the selection of the best alternative can be made in as many cases as *** paper proposes a model,the multi-criteria decision support method,that allows both service providers and consumers to maximize their profits while preserving the best matching process for resource allocation and task *** increasing number of service providers with different service provision capabilities creates an issue for consumers seeking to select the best service *** consumer seeks a service provider based on various preferences,such as price,service quality,and time to complete the *** the literature,the problem is viewed from different perspectives,such as investigating how to enhance task scheduling and the resource allocation process,improve consumers’trust,and deal with network *** paper offers a novel model that considers the preferences of both service providers and consumers to find the best available service provider for each ***,the model adopts the best-worst method(BWM)to gather and prioritize tasks based on consumers’and service providers’***,the model calculates and matches similarities between the sets of tasks from the consumer’s side with the sets of tasks from the provider’s side to select the best service provider for each consumer using the two proposed *** complexity of the two algorithms is found to be O(n3).

关键词： Best worst method BWM cloud service provider decision support methods

A Blockchain-Based Flexible Data Auditing Scheme for the cloud service

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Chinese Journal of Electronics 2021年第6期30卷 1159-1166页

作者： FAN Kefeng LI Fei YU Haiyang YANG Zhen China Electronics Standardization Institute Guangzhou Sequoia DB Co. College of Computer Science Beijing University of Technology

Nowdays, cloud storage technology has become a hot topic, and an increasing number of users are concerned with the security of their data in the *** auditing schemes on the cloud are proposed and the introduction of a third-party auditor to assist users in verifying the integrity of cloud data. As a centralized node, the third-party auditor has to communicate with all cloud users and cloud service providers, which becomes the bottleneck of the whole scheme. To solve this problem,we design a blockchain-based flexible cloud data auditing scheme. In our scheme, a decentralized auditing framework is proposed to eliminate the dependency on the thirdparty auditor, which increases the stability, security and performance of the whole scheme. Since the cloud service provider can automatically generates auditing proofs, our scheme can relieve the communication burdens of the cloud service provider. The proposed scheme also adapts the Merkle Hash tree to improve the verification *** analysis and experiments show that the proposed scheme is secure and has better stability and verification efficiency.

关键词： auditing schemes blockchain-based flexible data auditing scheme cloud users third-party auditor cloud service provider auditing decentralized auditing framework cloud storage technology security of data cloud computing data integrity storage management blockchain-based flexible cloud data

P2HBT: Partially Policy Hidden E-Healthcare System with Black-Box Traceability

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Chinese Journal of Electronics 2021年第2期30卷 219-231页

作者： YING Zuobin SI Yuanping MA Jianfeng JIANG Wenjie XU Shengmin LIU Ximeng School of Computer Science and Technology Anhui University Institutes of Physical Science and Information Technology Anhui University School of Computer Science and Technology Xidian University School of Information Systems Singapore Management University College of Mathematics and Computer Science Fuzhou University

Electronic health record(EHR), as the core of the e-healthcare system, is an electronic version of patient medical history, which records personal healthrelated information. EHR embodies the value of disease monitoring through large-scale sharing via the cloud service provider(CSP). However, the health data-centric feature makes EHR more preferable to the adversaries compared with other outsourcing data. Moreover, there may even be malicious users who deliberately leak their access privileges for benefits. An e-healthcare system with a black-box traceable and robust data security mechanism is presented for the first time. Specifically, we propose an effective P2 HBT, which can perform fine-grained access control on encrypted EHRs, prevent the leakage of privacy contained in access policies, and support tracing of *** the standard model, the scheme is proved fully secure. Performance analysis demonstrates that P2HBT can achieve the design goals and outperform existing schemes in terms of storage and computation overhead.

关键词： outsourcing cloud service provider malicious users effective P2HBT medical information systems partially policy hidden e-healthcare system electronic health record patient medical history security of data diseases black-box traceability data privacy authorisation electronic health records health data-centric feature cloud computing electronic version large-scale sharing access policies cryptography disease monitoring fine-grained access control health care outsourcing data black-box traceable robust data security mechanism encrypted EHRs personal health-related information access privileges EHR

cloud Data Encryption and Authentication Based on Enhanced Merkle Hash Tree Method

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Computers, Materials & Continua 2022年第7期72卷 519-534页

作者： J.Stanly Jayaprakash Kishore Balasubramanian Rossilawati Sulaiman Mohammad Kamrul Hasan B.D.Parameshachari Celestine Iwendi Department of CSE Mahendra Institute of TechnologyNamakkal637503India Department of EEE Dr.Mahalingam College of Engineering and TechnologyPollachi642003India Center for Cyber Security Faculty of Information Science and TechnologyUniversiti Kebangsaan Malaysia(UKM)43600BangiMalaysia Department of Telecommunication Engineering GSSS Institute of Engineering and Technology for WomenMysuruIndia School of Creative Technologies University of BoltonDeane RoadBoltonUnited Kingdom

Many organizations apply cloud computing to store and effectively process data for various *** user uploads the data in the cloud has less security due to the unreliable verification process of data *** this research,an enhanced Merkle hash tree method of effective authentication model is proposed in the multi-owner cloud to increase the security of the cloud *** Hash tree applies the leaf nodes with a hash tag and the non-leaf node contains the table of hash information of child to encrypt the large *** Hash tree provides the efficient mapping of data and easily identifies the changesmade in the data due to proper *** developed model supports privacy-preserving public auditing to provide a secure cloud storage *** data owners upload the data in the cloud and edit the data using the private *** enhanced Merkle hash tree method stores the data in the cloud server and splits it into *** data files requested by the data owner are audit by a third-party auditor and the multiowner authentication method is applied during the modification process to authenticate the *** result shows that the proposed method reduces the encryption and decryption time for cloud data storage by 2–167 ms when compared to the existing Advanced Encryption Standard and Blowfish.

关键词： cloud computing cloud data storage cloud service provider merkle hash tree multi-owner authentication third-party auditor

Enhanced Trust Based Access Control for Multi-cloud Environment

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Computers, Materials & Continua 2021年第12期69卷 3079-3093页

作者： N.R.Rejin Paul D.Paul Raj Technology PuduvoyalGummidipoondi601206India R M D Engineering College KavaraipettaiGummidipoondi601206India

Security is an essential part of the cloud *** ensuring the security of the data being communicated to and from the cloud server,a significant parameter called trust was ***-based security played a vital role in ensuring that the communication between cloud users and service providers remained unadulterated and *** most cloud-based data distribution environments,emphasis is placed on accepting trusted client users’requests,but the cloud servers’integrity is seldom *** paper designs a trust-based access control model based on user and server characteristics in a multi-cloud environment to address this *** proposed methodology consists of data encryption using Cyclic Shift Transposition Algorithm and trust-based access control *** this trust-based access control mechanism framework,trust values are assigned to cloud users using direct trust *** direct trust degree is estimated based on the following metrics:success and failure rate of interactions,service satisfaction index,and dishonesty *** addition to this,trust values are assigned to cloud servers based on the metrics:server load,service rejection rate,and service access *** role-Based Access control policy of each user is modified based on his trust *** the server fails to meet the minimum trust level,then another suitable server will be *** proposed system is found to outperform other existing systems in a multi-cloud environment.

关键词： cloud computing trust access control cloud service provider cloud data user CSTA

cloud services Quality Enhancement through Control &Monitoring of service Level Agreements at Server and Consumer Side

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Journal of Computer and Communications 2020年第8期8卷 78-90页

作者： Abel Adane Faculty of Computing and Software Engineering Institute of Technology Arba Minch University Arba Minch Ethiopia

Several researches and case studies have been revealing a repetitive issue and that is monopolization of controlling, measuring, and metering of the consumer’s billing for the consumed cloud services. The cloud service providers (CSPs) have been hiding, or monopolizing the controlling, metering tools and ignoring the calculation and consideration of the service defects like downtime, service outage, poor performance and client service migration delays during overloads of the servers. The main issues behind these discrepancies are the service Level Agreement (SLA), its violation, and the monopolized cloud Governance. Till now there is a lack of parallel monitoring and metering system of the consumed cloud services at the customer level under the provisions of SLAs. The cloud Governance Tier has not given any flexibility or utility to monitor such consumed cloud services at the client tier in parallel to the CSP tier. This research is an effort to develop a SLA controlling/monitoring framework to solve the identified problems other than the CSP level. Further the E_Draw max was used for designing the framework. The framework consists of the components like;SLA_CSP, SLA_CSC, SLA_M&C and cloud services and Delivery Models. After designing the framework, a prototype was developed using cloudSim on java net beans, and MySQL database. This prototype was implemented using four scenarios to evaluate its performance and the functionalities. 1) Checking the SLA under CSP whether the resources to the consumer in the same manner with promised. 2) To check if the request from cloud consumer is less than what is expected in SLA. 3) To check by increasing the request of cloud consumer more than what is expected in SLA and 4) Using the SLA_M&C mechanism. After execution it was observed that, in the first and the second cases there is no violation, but there is violation in the third and fourth cases. This implied that there are chances of the discrepancies in resources provided to m

关键词： cloud Computing service Consumer cloud service provider SLA SLA_CSC SLA_CSP SLA_M&C

Forensics Issues in cloud Computing

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Journal of Computer and Communications 2016年第10期4卷 63-69页

作者： Aqil Burney Muhammad Asif Zain Abbas Department of ASRM College of Computer Science and Information Systems IoBM Karachi Pakistan Department of Computer Science & Information Technology NEDUET Karachi Pakistan Department of Computer Science (UBIT) University of Karachi Karachi Pakistan

cloud computing is an emerging technology that is being widely adopted throughout the world due to its ease-of-use. Organizations of all types can use it without pre-requisites such as IT infra-structure, technical skills, managerial overload, storage capacity, processing power, and data recovery or privacy setup. It can be availed by all clients as per their needs, expectations and budget. However, cloud computing introduces new kinds of security vulnerabilities that need to be ad-dressed. Traditional “Computer Forensics” deals with detection, preemption and prevention of IT triggered frauds and crimes but it lacks the ability to deal with cybercrimes pertaining to cloud computing environment. In this paper, we focus on forensics issues in cloud computing, assess limitations of forensic team and present the obstacles faced during investigation.

关键词： Computer Forensics cloud Computing Cybercrimes cloud Security cloud service provider