【Author】 Zhou, Fang Chen, Ting-Yu
【影响因子】9.588
【主题类别】
区块链应用--
【Abstract】Blockchain technology draws worldwide attraction in the latest decade, and distributed ledger technology is widely used in various fields to increase efficiency, fairness, and security based on trust mechanisms. Blockchain technology represents a useful underlying technology to ensure trust in cross-border remittances for major banks and financial institutions. The selection of the appropriate blockchain technology provider is viewed as a classic multicriteria group decision-making (MCGDM) problem, which can be resolved to assist major banks in enhancing the quality of cross-border work. This article presents a combined MCGDM technique uniting the analytic hierarchy process (AHP) and TODIM, a Portuguese acronym for interactive multi-criteria decision making, for selecting an appropriate blockchain technology provider with Pythagorean fuzzy (PF) information. First, we establish hierarchical criteria for assessing the performance of blockchain technology providers in accordance with the available literature and characteristics of cross-border remittance work. Second, we adopt the PF-AHP technique to acquire relevant criterion weights, considering uncertainties of the decision-makers' judgments over the criteria. Third, we utilize the PF-TODIM technique to compute the relevant dominance degree of the providers, taking into account the decision-makers' psychological behaviors and preferences toward the risk of the blockchain technology. Fourth, we apply the proposed PF-AHP-TODIM technique to choose the appropriate blockchain provider for cross-border remittance work for a major bank and validate the efficiency and practicability of this hybrid technique over other available MCGDM methods.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Blockchain technology; Analytic hierarchy process (AHP); Interactive multi-criteria decision making (TODIM); Pythagorean fuzzy (PF) sets; Multicriteria group decision making (MCGDM)
【发表时间】
【收录时间】2022-01-17
【文献类型】 期刊
【Author】 Jorgensen, Kim Peiter Beck, Roman
【影响因子】5.675
【主题类别】
区块链技术--
【Abstract】
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Blockchain; Universal wallet; Crypto wallet; Token
【发表时间】
【收录时间】2022-01-17
【文献类型】 期刊
【Author】 Su, Hong Guo, Bing Lu, Jun Yu Suo, Xinhua
CCF-C
【影响因子】3.732
【主题类别】
区块链技术--
【Abstract】Cross-chain exchange is an important way to promote cooperation and exchange between different blockchains. However, current cross-chain approaches mainly rely on smart contracts with essential pre-deployment steps, several of which need to be synchronized, resulting in low performance. In this paper, we propose an asynchronous cross-chain exchange model based on a transaction that embeds a control condition to determine whether to transfer assets. The condition is used to specify the paired transaction. In order to find which cross-chain transaction meets the condition, the fields of cross-chain transactions are compared mutually, including sender, receiver, value, blockchain identifier, etc. Meanwhile, the balance process in the blockchain consensus needs to be changed: subtracting the balance of the sender first, increasing the balance of the receiver when the conditions match, or returning the assets to the sender if the time expires. By embedding conditions in transactions, the step of pre-deploying smart contracts is eliminated, and transactions can be sent in parallel. The simulation results show that compared with smart contract-based method, the exchange waiting time is reduced by up to 73.4%.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Cross-chain; Cross-chain exchange; Transaction dependence; Conditional transaction
【发表时间】
【收录时间】2022-01-17
【文献类型】 期刊
【Author】 Ferreira, Agata
【影响因子】3.160
【主题类别】
区块链治理--
【Abstract】Stablecoins is a blockchain-driven innovation and a new subset of crypto assets. Even though they could transform how payments are made, regulators paid little attention to them until recently. The announcement of the Libra project in 2019 elevated stablecoins to the top of the regulatory agenda. Libra's global scale and its capacity to reach billions of potential users through a user-centric social network platform that is already seamlessly integrated within the lives of the global population and the potential impact of a global yet fast and cheap payment solution raised many issues and concerns among authorities related to not only financial stability, monetary policy, and competition, but also money laundering, financing of terrorism, and others. Addressing stablecoins has proven challenging for many regulators as they face a difficult task of balancing financial stability, with innovation. This paper analyzes how the official perception of stablecoins has evolved, from dismissiveness and underestimation to serious concern. It evaluates existing regulatory responses, highlights regulatory dilemmas, and makes recommendations regarding future regulatory approaches. To reap the benefits of stablecoin innovation, regulators need to take a broader long-term view of stablecoins beyond the perceived risks and embrace their advantages. Regulations should not stifle this innovation but support a diverse ecosystem of stablecoins and foster competition.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】
【发表时间】2021
【收录时间】2022-01-17
【文献类型】 期刊
【DOI】 10.1093/jiel/jgab036
【Author】 Lavanya, M. Kavitha, V.
【影响因子】2.017
【主题类别】
区块链应用--
【Abstract】The widespread usage of cloud-based e-health systems is increasing at a faster pace due to the advancement in managing Electronic Health Record (EHR), disease analysis, providing prescriptions, etc. But, traditional systems are prone to challenges in security during the storage and data transaction. Hence, it is complex to integrate the EHR into the cloud-based system as it affects the privacy of the user. At present, blockchain is used in sharing and analysis of EHR since it provides high security and possesses unique properties such as tamper resistance and decentralized data sharing. Here, we propose cloud-assisted medSupport blockchain for the secure transaction of EHR to the cloud server (CS) and providing medical services to the user. At first, smart registration of patients and doctors into the CS is performed simultaneously and then we generate key-based access control using the Secure Password Authentication based Key Exchange (SecPAKE). For secure EHR transactions, access policies are defined in the smart contract. Also, all the transactions and prescriptions made by the entities are stored in the blockchain. Finally, the performance of the medSupport blockchain is evaluated in comparison with other existing approaches and the proposed model outperforms other traditional methods.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Blockchain; EHR; Security; Authentication; Biometric; e-health
【发表时间】
【收录时间】2022-01-17
【文献类型】 期刊
【影响因子】1.443
【主题类别】
区块链治理--
【Abstract】This article discusses whether electronic banknotes can properly be characterised as 'banknotes', their design as such and what architectural models are available for their issuance by central banks. Issues are addressed under general principles governing the interpretation of monetary laws in the context of evolving technologies and institutional arrangements. The article proposes a clear terminology to address the concepts underlying digital currencies and access to central bank money, and argues that a banknote may be 'written' electronically. The stance adopted in the article is critical of both account-based retail central bank digital currency and cryptocurrencies, and highlights the salient features of non-blockchain token-based alternatives. It sheds light on the considerations that influence the selection of a design that is appropriate from both the functional and legal perspectives.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】banknote; e-banknote; digital currency; CBDC; cryptocurrency; central bank; ECB; legal tender; monetary law
【发表时间】2021
【收录时间】2022-01-17
【文献类型】 期刊
【DOI】 10.1093/ojls/gqab019
【影响因子】0.000
【主题类别】
区块链技术--
【Abstract】With the rapid growth of Internet of Things (IoT), it can be foreseen that IoT services will be influencing several use-cases. IoT brings along the security and privacy issues that may hinder its wide scale adoption. The scenarios in IoT applications are quite dynamic as compared to the traditional internet. It is vital that only authenticated and authorised users get access to the services provided. Hence, there is a need for a novel authentication and access control technique that is compatible and practically applicable in diverse IoT scenarios to provide adequate security to devices and data communicated. This article aims to highlight the potential of blockchain for enhanced and secured authentication and access control in IoT. The proposed method relies on blockchain technology, which tends to eliminate the limitations of intermediaries for authentication and access control. As compared to existing systems, it has advantages of decentralisation, secured authentication, authorisation, adaptability, and scalability.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Internet of Things; security; authentication; access control; blockchain
【发表时间】2021
【收录时间】2022-01-17
【文献类型】 期刊
【Author】 Taloba, Ahmed, I Rayan, Alanazi Elhadad, Ahmed Abozeid, Amr Shahin, Osama R. Abd El-Aziz, Rasha M.
【影响因子】0.000
【主题类别】
区块链治理--
【Abstract】In the current era of smart cities and smart homes, the patient's data like name, personal details and disease description are highly insecure and violated most often. These details are stored digitally in a network called Electronic Health Record (EHR). The EHR can be useful for future medical researches to enhance patients' healthcare and the performance of clinical practices. These data cannot be accessible for the patients and their caretakers, but they are readily available for unauthorized external agencies and are easily breached by hackers. This creates an imbalance in data accessibility and security. This can be resolved by using blockchain technology. The blockchain creates an immutable ledger and makes the transaction to be decentralized. The blockchain has three key features namely Security, Transparency, and Decentralization. These key features make the system to be highly secured, prevent data manipulation, and can only be accessible by authorized persons. In this paper, a blockchain-based security framework has been proposed to secure the EHR and provide a safe way of accessing the clinical data of the patients for the patients and their caretakers, doctors, and insurance agents using cryptography and decentralization. The proposed system also maintains the balance between data accessibility and security. This paper also establishes how the proposed framework helps doctors, patients, caretakers, and external authorities to securely store and access patients' medical data in EHR.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Blockchain; electronic health record (EHR); storage; security; accessibility; cryptography; decentralization
【发表时间】2021
【收录时间】2022-01-17
【文献类型】 期刊
【Author】 Harikrishnan, B. Balasubaramanian, T.
【影响因子】0.000
【主题类别】
区块链技术--
【Abstract】In mobile ad-hoc network (MANET) environment, routing of data packets is a challenging task due to rapid changes in mobility and network topology. In addition, the security aspect of routing is disturbed by attacks caused by malicious nodes. These attacks greatly affect the Quality of Service. To overcome the challenges faced in routing message packets, the Bayesian Directed Acyclic Graph (B DAG) Aided Blockchain model is proposed for clustered MANET environment. The proposed model encompasses the following processes: (i) Multi factor authentication of users by using BLISS algorithm. This step involves acquisition of user credentials and generates hash values for those credentials using Cube Hash algorithm. These hash values are further used to generate public and private keys by BLISS algorithm, (ii) Weighted sum computation for clustering to reduce complexity in the MANET environment. Cluster head (CH) and cluster member (CM) are classified based on energy status, geometric distance, link quality and direction, (iii) A secure AODV based routing protocol using Dolphin Swarm Optimization (DSO) algorithm. This step involves selection of reputed node based on link stability, relative velocity, available bandwidth, energy, queue length, and trust. The packet forwarding is based on the reputation value of the node, by which the trust provided by malicious nodes are eliminated to improve security and (iv) Bayesian DAG aided blockchain, in which the user authenticity, data integrity of packets and signature are verified to mitigate the routing attacks created by nodes in the MANET environment. The proposed model is experimented in NS 3.26 network simulator tool and its performance in terms of multiple QoS metrics is evaluated.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Mobile ad-hoc network; node authentication; BLISS algorithm; blockchain; Bayesian direct acyclic graph
【发表时间】2021
【收录时间】2022-01-17
【文献类型】 期刊
【Author】 El Kassmi, Ilyass Jarir, Zahi
【影响因子】0.000
【主题类别】
区块链应用--
【Abstract】Collaborative business activities have aroused great interest from organizations because of the benefits they offer. However, sharing data, services, and resources and exposing them to external use can prevent organizations involved in collaboration from being engaged. Therefore, the need for advanced mechanisms to ensure trust between the different parties involved is paramount. In this context, blockchain and smart contracts are promising solutions for performing choreography processes. However, the seamless integration of these technologies as non-functional requirements in the design and implementation phases of inter-organizational collaborative activities is a challenging task, as reported in the literature. Consequently, we aim in the proposed approach to extend the modeling and implementation of the choreography lifecycle based on service-oriented processes. This is fulfilled by integrating blockchain transactions and smart contract calls, to allow collaboration and interoperability between different entities while guaranteeing trust and auditability. Moreover, to conduct this extension efficiently we use a BPMN choreography diagram combined with Finite State Automata to ensure a meticulous modeling which targets the processes' internal interactions. Hyperledger Fabric is used as a permissioned blockchain for proof-of-concept implementation. A use case of COVID-19 collaborative processes is used to experiment our approach, which aims to guarantee a fluid collaboration between healthcare providers and epidemiological entities at a national scale in Morocco.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Blockchain; inter-organizational collaboration; choreography; permissioned blockchain; business process management; COVID-19
【发表时间】2021
【收录时间】2022-01-17
【文献类型】 期刊
【Author】 Humayun, Mamoona
【影响因子】0.000
【主题类别】
综述--
【Abstract】IR 4.0 emphasizes the interconnection of machines and systems to achieve optimal performance and productivity gains. IR 5.0 is said to take it a step further by fine-tuning the human-machine connection. IR 5.0 is more collaboration between the two: automated technology's ultra-fast accuracy combines with a human's intelligence and creativity. The driving force behind IR 5.0 is customer demand for customization and personalization, necessitating a greater human involvement in the production process. As IR 5.0 evolves, we may expect to see a slew of breakthroughs across various industries. However, just automating jobs or digitizing processes will not be enough; the finest and most successful businesses will be those that can combine the dual powers of technology and human ingenuity. IR 5.0 focuses on the use of modern cutting-edge technologies, namely, AI, IoT, big data, cloud computing, Blockchain, Digital twins, edge computing, collaborative robots, and 6G along with leveraging human creativity and intelligence. Wherever possible, IR 5.0 will change industrial processes worldwide by removing mundane, filthy, and repetitive activities from human workers. Intelligent robotics and systems will have unparalleled access to industrial supply networks and production floors. However, to understand and leverage the benefits of IR 5.0 better, there is a need to understand the role of modern CET in industrial revolution 5.0. To fill this gap, this article will examine IR 5.0 prospective, uses, supporting technologies, opportunities, and issues involved that need to be understood for leveraging the potentials of IR 5.0.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Industry 5.0; cutting-edge technologies; Internet of Things; Aartificial intelligence; big data
【发表时间】2021
【收录时间】2022-01-17
【文献类型】 综述