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نتیجه جستجو - Hyperledger fabric

تعداد مقالات یافته شده: 11
ردیف عنوان نوع
1 Post-Quantum Blockchain-Based Data Sharing for IoT Service Providers
به اشتراک گذاری داده های مبتنی بر بلاک چین پسا کوانتومی برای ارائه دهندگان خدمات اینترنت اشیا-2022
Quantum technologies have made significant advances and are likely to lead to important security challenges and threats to networks in the near future. On the other hand, sharing the huge amount of data from the Internet of Things (IoT) in the context of data as a service could provide new revenue streams for infrastructure providers and service providers. However, post-quantum computing exposes the entire data sharing ecosystem to a new set of security risks. In this article, we propose a novel blockchain-based system for data sharing in the post-quantum era. The proposed system facilitates data sharing among multiple organizations while meeting compliance and regulatory requirements via private blockchain. We implemented the proposed architecture and information flow using three blockchain networks (namely Hyperledger Fabric, Ethereum, and Quorum) and selected NTRU as our quantum resistant security algorithm (QRSA) to compare the parallelization performance of Toom-Cook’s and Karatsuba’s computation methods. Experimental results show that parallel computation has a positive impact when the security level of QRSAs is lowered, and the transaction time savings is almost 50 percent in favor of Quorum. Finally, we outline the main challenges and potential solutions.
مقاله انگلیسی
2 Integrated project delivery with blockchain: An automated financial system
تحویل یکپارچه پروژه با بلاکچین : یک سیستم مالی خودکار-2020
Integrated project delivery (IPD) in the architecture, engineering and construction (AEC) industry relies on risk/ reward sharing and deferral of parties profit payments until all project activities are completed. A decentralised, automated and secured financial platform is needed to enable all parties to control and track financial transactions, with no unauthorised changes allowed. The new technology, blockchain, enables data to be recorded, has no network participant with dominant power and manages data using specific functions, in line with smart contracts. The present study is the first to develop a framework proposing blockchain technology utilisation in IPD projects. The framework would enable core project team members to automatically execute all financial transactions, through coding the three main transactions of IPD projects: reimbursed costs, profit and cost saving, as functions of the IPD smart contract. To demonstrate the proposed frameworks applicability, a “proof of concept” is developed and validated through an IPD case project. The practicality of the built-up hyperledger network (IBM® Blockchain Cloud Beta 2) and the advantages of the proposed smart contract functions are examined. The user-friendliness of the proposed financial system and its efficiency in automating all transactions are demonstrated. No deficiency is found in the blockchain network components. The studys findings, applied in a favourable external context, would facilitate IPD adoption and use across the AEC industry by providing a workable solution to existing financial barriers. The findings extend the horizon for further research on exploring blockchains capabilities to solve comparable deficiencies to those affecting the AEC industry.
Keywords: Distributed ledger technology (DLT) | Smart contract | Hyperledger fabric | Building Information Modelling (BIM) | Alliancing | 5D BIM | Financial transactions
مقاله انگلیسی
3 Public and private blockchain in construction business process and information integration
بلاکچین دولتی و خصوصی در فرآیند تجارت ساخت و ساز و ادغام اطلاعات-2020
Blockchain as an emergent decentralized digital technology has been widely explored in many sectors to remedy the deficiencies of centralized solutions It has been recognized that blockchain technology has great potential to facilitate business activities spanning the whole life cycle of a building project in the construction industry, such as better communication or understanding, documents sharing, stage transition and quality endorsement. A comprehensive review of the literature regarding the application of blockchain in the construction domain found that there are few studies and applications of blockchain in construction practices, and most of the current research involves qualitative studies only. In this paper, we aim to explore the feasibility of applying both public blockchain and private blockchain technologies in the construction industry using two industry cases. Two business process cases (i.e., Case 1 and Case 2) were selected and used to drive the blockchain-based software system architecture design. The proposed architectures were demonstrated using Hyperledger Fabric (a private, permissioned and open source blockchain platform) and Ethereum (a public blockchain platform) respectively, to reflect the different requirements of the two use cases. This pilot study also illustrates the process, benefits, and challenges of adopting private and public blockchain technologies in construction domain. This research provides insights to researchers and practitioners regarding the adoption of blockchain technology, especially in construction industry.
Keywords: Blockchain | Construction industry | Business process management | Smart contract | Ethereum | Hyperledger fabric
مقاله انگلیسی
4 Integrated project delivery with blockchain: An automated financial system
تحویل یکپارچه پروژه با بلاکچین : یک سیستم مالی خودکار-2019
Integrated project delivery (IPD) in the architecture, engineering and construction (AEC) industry relies on risk/ reward sharing and deferral of parties profit payments until all project activities are completed. A decentralised, automated and secured financial platform is needed to enable all parties to control and track financial transactions, with no unauthorised changes allowed. The new technology, blockchain, enables data to be recorded, has no network participant with dominant power and manages data using specific functions, in line with smart contracts. The present study is the first to develop a framework proposing blockchain technology utilisation in IPD projects. The framework would enable core project team members to automatically execute all financial transactions, through coding the three main transactions of IPD projects: reimbursed costs, profit and cost saving, as functions of the IPD smart contract. To demonstrate the proposed frameworks applicability, a “proof of concept” is developed and validated through an IPD case project. The practicality of the built-up hyperledger network (IBM® Blockchain Cloud Beta 2) and the advantages of the proposed smart contract functions are examined. The user-friendliness of the proposed financial system and its efficiency in automating all transactions are demonstrated. No deficiency is found in the blockchain network components. The studys findings, applied in a favourable external context, would facilitate IPD adoption and use across the AEC industry by providing a workable solution to existing financial barriers. The findings extend the horizon for further research on exploring blockchains capabilities to solve comparable deficiencies to those affecting the AEC industry.
Keywords: Distributed ledger technology (DLT) | Smart contract | Hyperledger fabric | Building Information Modelling (BIM) | Alliancing | 5D BIM | Financial transactions
مقاله انگلیسی
5 Blockchain in healthcare and health sciences : A scoping review
بلاکچین در مراقبت های بهداشتی و علوم بهداشتی: بررسی مقدماتی-2019
Background: Blockchain can be described as an immutable ledger, logging data entries in a decentralized manner. This new technology has been suggested to disrupt a wide range of data-driven domains, including the health domain. Objective: The purpose of this study was to systematically review, assess and synthesize peer-reviewed publications utilizing/proposing to utilize blockchain to improve processes and services in healthcare, health sciences and health education. Method: A structured literature search on the topic was conducted in October 2018 relevant bibliographic databases. Result: 39 publications fulfilled the inclusion criteria. The result indicates that Electronic Health Records and Personal Health Records are the most targeted areas using blockchain technology. Access control, interoperability, provenance and data integrity are all issues that are meant to be improved by blockchain technology in this field. Ethereum and Hyperledger fabric seem to be the most used platforms/frameworks in this domain. Conclusion: This study shows that the endeavors of using blockchain technology in the health domain are increasing exponentially. There are areas within the health domain that potentially could be highly impacted by blockchain technology.
Keywords: Blockchain | Health systems | Scoping review | Distributed ledger
مقاله انگلیسی
6 A novel data exploitation framework based on blockchain
چارچوب سوءاستفاده از داده های جدید مبتنی بر بلاکچین -2019
As we are moving towards the Internet of Things (IoT), the number of connected objects is growing at a rapid pace. These smart devices continuously generate enormous amounts of data, which can be valuable for many services. One key point hindering the growth of such services is that they often deal with personal and sensitive data. That usually leads users to be more conservative about the usage of their data by third parties. In this context, a seamless need has emerged in order to build an Intelligent Data Exploitation System (IDES) whereby service providers exploit users’ data in a secure and more transparent manner. To achieve this goal, we propose in this paper a novel framework based on blockchain in order to promote personal data. The proposed solution is user centric in the sense that the user has the complete control on his data’s exploitation life-cycle. Besides, services providers will not have a copy on the data itself. Instead, a separate secure environment is proposed in order to execute a model on top of data. To assess the performance of this work, a real world application has been developed. Hyperledger Fabric 1.1 is used as a blockchain technology and a combination between Graphene-SGX and Cryptobox is used as a secure execution environment. Experimental analysis showed that the proposed solution is secure and efficient enough to be integrated within a real world application.
مقاله انگلیسی
7 Blockchain-based electronic healthcare record system for healthcare 4.0 applications
سیستم ضبط بهداشت الکترونیکی مبتنی بر بلاکچین برای برنامه های کاربردی مراقبت های بهداشتی 4.0-2019
Modern healthcare systems are characterized as being highly complex and costly. However, this can be reduced through improved health record management, utilization of insurance agencies, and blockchain technology. Blockchain was first introduced to provide distributed records of money-related exchanges that were not dependent on centralized authorities or financial institutions. Breakthroughs in blockchain technology have led to improved transactions involving medical records, insurance billing, and smart con- tracts, enabling permanent access to and security of data, as well as providing a distributed database of transactions. One significant advantage of using blockchain technology in the healthcare industry is that it can reform the interoperability of healthcare databases, providing increased access to patient medical records, device tracking, prescription databases, and hospital assets, including the complete life cycle of a device within the blockchain infrastructure. Access to patients’ medical histories is essential to cor- rectly prescribe medication, with blockchain being able to dramatically enhance the healthcare services framework. In this paper, several solutions for improving current limitations in healthcare systems using blockchain technology are explored, including frameworks and tools to measure the performance of such systems, e.g., Hyperledger Fabric, Composer, Docker Container, Hyperledger Caliper, and the Wireshark capture engine. Further, this paper proposes an Access Control Policy Algorithm for improving data ac- cessibility between healthcare providers, assisting in the simulation of environments to implement the Hyperledger-based eletronic healthcare record (EHR) sharing system that uses the concept of a chain- code. Performance metrics in blockchain networks, such as latency, throughput, Round Trip Time (RTT). have also been optimized for achieving enhanced results. Com pared to traditional EHR systems, which use client-server architecture, the proposed system uses blockchain for improving efficiency and security.
Keywords: Blockchain | Healthcare systems | Security | Chaincode | Electronic healthcare records
مقاله انگلیسی
8 A multi-agent autonomous intersection management (MA-AIM) system for smart cities leveraging edge-of-things and Blockchain
سیستم مدیریت تقاطع مستقل چند عامل (MA-AIM) برای شهرهای هوشمند که حاشیه اشیا و بلاکچین را اعمال می کند-2019
The growing trend of people moving around urban areas requires more intelligent transportation-support services in smart cities. In this context, the number of traffic colli- sions, especially in intersections, has rapidly increased as well as the number of vehicles. The leading cause of this is represented by human errors in recognition and decision mak- ing. Thus, the development of secure Autonomous Intersection Management (AIM) systems is an emerging challenge. In this paper, we propose a Multi-Agent AIM (MA-AIM) system based on Vehicle-to-Infrastructure (V2I) and Infrastructure-to-Vehicle (I2V) communica- tions able to safely manage vehicles crossing through an intersection leveraging both Edge of Things (EoT) and Blockchain facilities. The proposed system includes an Intersection Manager Agent (IMA) that: i) interacts with vehicles through Driver Agents (DAs) installed on them in an EoT environment, and ii) uses Blockchain mechanisms in order to orches- trate the passage of vehicles crossing the intersection safely. In particular, we implemented a proof-of-concept integrating the AIM 4.0 simulator with Hyperledger Fabric (implement- ing Blockchain capabilities) and with Node-RED (implementing V2I/I2V communications in an EoT environment). Preliminary experiments show the feasibility and potentiality of our solution.
Keywords: Vehicular cloud computing | Edge computing | Internet of things | Blockchain | Accident prevention | Intersection management
مقاله انگلیسی
9 A novel credential protocol for protecting personal attributes in blockchain
یک پروتکل معتبر جدید برای محافظت از ویژگی های شخصی در بلاکچین-2019
This paper proposes a novel user-centric and privacy-preserving credential scheme over the blockchain. The proposed protocol allows users to access services without revealing sensitive attributes. This new paradigm is based on an efficient short signature, which uses pairing and self-blindable credentials that are verifiable on the blockchain. Our scheme achieves the advanced features of anonymity, unlinkability, and untraceability of users. Moreover, confidentiality of users’ attributes and unforgeability of their credentials are met. We provide security proofs and a real-world use-case where the protocol can be ap- plied. To empirically assess the performance of our solution, the cryptographic components and communications between the various involved actors are implemented using GO and Java. In addition, an implementation for an online trading use case based on Hyperledger Fabric is provided. Finally, we prove the efficiency of our work by presenting some exper- imental results and exhibiting comparisons with known traditional credentials schemes.
Keywords: Blockchain | Online trading System | Hyperledger fabric | User-centric system | Privacy-preserving credential | Short signature | Pairing Self-blind | Security proofs
مقاله انگلیسی
10 MudraChain: Blockchain-based framework for automated cheque clearance in financial institutions
MudraChain: چارچوب مبتنی بر بلاکچین برای ترخیص خودکار چک در موسسات مالی-2019
Currently, the burden on the cheque clearing houses in financial institutions is increasing day-byday, which necessitates the upgrading of the existing cheque truncation system (CTS). It is a manual process which uses Magnetic Ink Character Recognition (MICR), where cheques have been scanned and sent to the clearing house for further processing. The limitations of existing CTS are — illegal duplication of cheque images, invisible ink usage, visibility issues in beneficiary name, and amount on the cheque. To handle the aforementioned issues of the existing CTS, blockchain has emerged as a new technology which is a distributed ledger that is timestamped and immutable. Being immutable, forgeries related to images of cheques during clearance cycles are not allowed. This provides trust and consensus among all participating entities in the network. Motivated by the above discussion, in this paper, we propose a framework named MudraChain for automated cheque clearance, where clearance operations are handled by the blockchain network, instead of existing CTS. It includes: (i) A multi-level authentication scheme to make the blockchain-based framework secure and tamperproof among participating financial stakeholders, (ii) A quick-response (QR) code generation algorithm which performs digital signing of a cheque, and (iii) A novel two-factor authentication protocol to generate a time based one-time password (TOTP) for secure funds transfer. The obtained results are examined against state-of-the-art approaches to indicate the supremacy of the proposed framework. Thus, MudraChain allows a seamless flow of clearance operation via blockchain for the payer and the payee without any intermediaries. Finally, it addresses the requirements of building a secure application for cheque clearance in view of decentralized blockchain 4.0 applications.
Keywords: Blockchain | QR code | Two-factor authentication | Cheque clearance | Hyperledger fabric
مقاله انگلیسی
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