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International Journal of Blockchains and Cryptocurrencies最新文献

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Portfolio performance analysis: a case study of cryptocurrencies 投资组合绩效分析:加密货币的案例研究
International Journal of Blockchains and Cryptocurrencies Pub Date : 2020-11-24 DOI: 10.1504/ijbc.2020.10032870
Florin Aliu, Artor Nuhiu, P. Palka, Michaela Blahová
{"title":"Portfolio performance analysis: a case study of cryptocurrencies","authors":"Florin Aliu, Artor Nuhiu, P. Palka, Michaela Blahová","doi":"10.1504/ijbc.2020.10032870","DOIUrl":"https://doi.org/10.1504/ijbc.2020.10032870","url":null,"abstract":"The study measures the risk level linked with different portfolios of cryptocurrencies by using portfolio diversification techniques. Data on prices and trade volumes of cryptocurrencies were collected on a daily basis, from 2012 till 2018. Ten portfolios were constructed based on diverse types and numbers of cryptocurrencies. The results of the study confirm a negative relationship between the average number of cryptocurrencies and the average risk level of the portfolio. Involving more cryptocurrencies within the portfolio reduces the diversification risk of the portfolio. The average volatility and average correlation coefficient both drop when moving towards portfolios with more cryptocurrencies. Average returns stand against portfolio theories, where more risky portfolios offer less daily weighted average returns and the other way around. Outcomes of the study provide indications for the individual investors and financial institutions on the risk characteristic attached to the portfolio of cryptocurrencies.","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"289 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117293259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Blockchain-based federated identity and auditing 基于区块链的联邦身份和审计
International Journal of Blockchains and Cryptocurrencies Pub Date : 2020-08-14 DOI: 10.1504/ijbc.2020.10031109
M. El-Gayyar, H. ElYamany, Katarina Grolinger, Miriam A. M. Capretz, Syed Mir
{"title":"Blockchain-based federated identity and auditing","authors":"M. El-Gayyar, H. ElYamany, Katarina Grolinger, Miriam A. M. Capretz, Syed Mir","doi":"10.1504/ijbc.2020.10031109","DOIUrl":"https://doi.org/10.1504/ijbc.2020.10031109","url":null,"abstract":"A federated identity is a single identity that enables users to access multiple services across a network of business parties. Such identities are subject to various threats and attacks and face diverse challenges including identity leaks, centralised management, auditing limitations, and long breach investigation processes. This paper proposes a framework aimed at automating and decentralising the generation and auditing of a robust and secured blockchain-based federated identity in a marketplace. Business parties participating in the marketplace form the nodes of a distributed blockchain network and participate in the creation of federated identities. Users of this network can access services provided by any one of the participating parties using a single federated identity. All transactions are fully audited in the blockchain, meaning that participating parties can monitor access to their service and users can trace the use of their identities. The proposed framework has been evaluated using two blockchain technologies (Ethereum and Hyperledger Fabric) to measure its performance in public and permissioned blockchain environments.","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"128 20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121606873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Future of currency: a comparison between traditional, digital fiat and cryptocurrency exchange mediums 货币的未来:传统、数字法币和加密货币交换媒介的比较
International Journal of Blockchains and Cryptocurrencies Pub Date : 2020-08-07 DOI: 10.1504/ijbc.2020.10031108
Mohammad Zainullah Khan, Y. Ali, H. Sultan, Muhammad Hasan, Salar Baloch
{"title":"Future of currency: a comparison between traditional, digital fiat and cryptocurrency exchange mediums","authors":"Mohammad Zainullah Khan, Y. Ali, H. Sultan, Muhammad Hasan, Salar Baloch","doi":"10.1504/ijbc.2020.10031108","DOIUrl":"https://doi.org/10.1504/ijbc.2020.10031108","url":null,"abstract":"The ever-increasing computing power backed by Moore's law and the rapid breakthroughs in encryption has transformed the way currency is transferred and used. While the traditional government-controlled currency maintains its dominant position, a new virtual currency known as cryptocurrency has sprung up. It competes head-on by decentralizing the system, facilitating peer-to-peer transactions, and offering a universal exchange medium. However, the phase shift process is in its early stage, hindered by doubts in the mind of the public. In this paper, a comparison has been made between traditional, digital fiat and cryptocurrency, using the technique for order of preference by similarity to ideal solution (TOPSIS). It helped to ascertain the current level of awareness amongst the people of Pakistan and their likelihood of adopting the virtual currency. A forecasting approach along with a case study is also employed to see the future trends and security concerns revolving around the new medium.","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134639346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Cryptocurrencies: the communication inside Blockchain technology and the cross-border Tax Law 加密货币:区块链技术和跨境税法内部的沟通
International Journal of Blockchains and Cryptocurrencies Pub Date : 2019-08-20 DOI: 10.1504/IJBC.2019.10021394
A. Garcia, Pedro Henrique Romaoli Garcia
{"title":"Cryptocurrencies: the communication inside Blockchain technology and the cross-border Tax Law","authors":"A. Garcia, Pedro Henrique Romaoli Garcia","doi":"10.1504/IJBC.2019.10021394","DOIUrl":"https://doi.org/10.1504/IJBC.2019.10021394","url":null,"abstract":"This research aims to analyse the social event that is modifying the traditional financial system since the blockchain technology and cryptocurrencies came up. Taxation in international scenario were examined by the ideal from governments in a democratic system as an instrument that materialises human rights. The social observation approaches the legacy of Emile Durkheim philosophy who established a power relationship between social fact and coercion. Taxation has been the focal point in smart economy to juridical scientists and everyone involved in the digital economy. This research conducted tests and researches from historical and social method, seeking for laws, doctrine, jurisprudence and concrete case analysis in front of the philosophical school of logical-semantic constructivism as a suitable means to verify the possibility of constructing a matrix rule of tax incidence. This research was enough to show that the blockchain technology and cryptocurrencies fulfils its humanitarian role in the smart economy.","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124971958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A quick synopsis of Blockchain Technology 区块链技术的快速概要
International Journal of Blockchains and Cryptocurrencies Pub Date : 2019-08-20 DOI: 10.1504/IJBC.2019.10021396
Veeramani Karthika, S. Jaganathan
{"title":"A quick synopsis of Blockchain Technology","authors":"Veeramani Karthika, S. Jaganathan","doi":"10.1504/IJBC.2019.10021396","DOIUrl":"https://doi.org/10.1504/IJBC.2019.10021396","url":null,"abstract":"Blockchain evolved as a core technology of Bitcoin, and earned a significant attraction for entrepreneurs and researchers nowadays. The blockchain is an open, immutable distributed public ledger that allows transactions to take place in a decentralised manner without a need for a trusted third party. Bitcoin, the first successful cryptocurrency, is a peer-to-peer electronic payment system. The thought for Bitcoin started as a means for making a secure currency that had no centralised control. Blockchain application is not only restricted to Bitcoin, but it also ignited the idea of using it for a wide range of fields such as ehealth, governance, arts, culture, education, electricity trading, etc. To apply this technology to many areas, one should have a complete understanding of what it is, this paper is meant to give a quick synopsis of blockchain technology (BT).","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127572785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Mathematical Assessment of Blocks acceptance in Blockchain using Markov Model 基于马尔科夫模型的区块链中块接受度的数学评估
International Journal of Blockchains and Cryptocurrencies Pub Date : 2019-08-20 DOI: 10.1504/IJBC.2019.10021395
R. Srivastava
{"title":"Mathematical Assessment of Blocks acceptance in Blockchain using Markov Model","authors":"R. Srivastava","doi":"10.1504/IJBC.2019.10021395","DOIUrl":"https://doi.org/10.1504/IJBC.2019.10021395","url":null,"abstract":"Blockchain, introduced in bitcoin system is disrupting the way transactions are done in businesses via charging small transaction fees. It is observed that the acceptance of blocks in the blockchain is based on transaction value. Transmittals through blockchain are favoured due to low transaction cost and grander security. However, attempt of implementing blockchain to revolutionise business processes writhes from problem of waiting time for blocks. In this paper, the transaction-confirmation-time is appraised using queuing theory, where the approval rate of blocks in blockchain is concocted using Markov queue model. Four specific use cases of 1, 3, 6 and 60 confirmations are considered for practical purposes.","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129573301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Consensus Protocols as a Model of Trust in Blockchains 共识协议作为区块链中的信任模型
International Journal of Blockchains and Cryptocurrencies Pub Date : 2019-08-20 DOI: 10.1504/IJBC.2019.10020421
Auqib Hamid Lone, R. N. Mir
{"title":"Consensus Protocols as a Model of Trust in Blockchains","authors":"Auqib Hamid Lone, R. N. Mir","doi":"10.1504/IJBC.2019.10020421","DOIUrl":"https://doi.org/10.1504/IJBC.2019.10020421","url":null,"abstract":"Blockchain is a decentralised, replicated, transparent and immutable data store. Blockchains are best described not as 'trustless', but on the basis of distributed trust: trusting everyone in aggregate. Consensus protocols are the heart and soul of the blockchains as they help in achieving this distributed trust. Blockchains are updated via the consensus protocols that guarantee their consistency and integrity over geographically distributed network nodes. Various algorithms can be applied to achieve a consensus based on the requirements like performance, security, scalability, consistency, and failure redundancy. Creating a global fair decentralised consensus protocol is of prime importance, in order to address above-mentioned requirements sufficiently. This paper focuses on analysing the already proposed consensus protocols adopted by popular blockchain platforms to determine their feasibility and efficiency. Parameters that are critical in evaluating blockchain consensus protocol are also discussed. This paper also analyses the hardness of achieving the fair decentralised trust with proof.","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134274714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Digital Ledger Technology based Real Estate Transaction Mechanism & its Block Size Assessment 基于数字账本技术的房地产交易机制及其区块大小评估
International Journal of Blockchains and Cryptocurrencies Pub Date : 2019-08-20 DOI: 10.1504/IJBC.2019.10021397
Nikita Singh, M. Vardhan
{"title":"Digital Ledger Technology based Real Estate Transaction Mechanism & its Block Size Assessment","authors":"Nikita Singh, M. Vardhan","doi":"10.1504/IJBC.2019.10021397","DOIUrl":"https://doi.org/10.1504/IJBC.2019.10021397","url":null,"abstract":"Distributed ledger technology (DLT) is set to transform the existing architectural models of financial institutions and government machineries. Although real estate transactions are a major source for the governments to earn revenue, these are plagued with the risk of fraudulent practices. The digital documents are vulnerable to the alteration or any other attacks or can be tampered and ownership of the documents can be changed. The centralised storage involves single point of failure as well as network traffic overhead. The proposed distributed and decentralised blockchain-based architecture provides protection against any intrusive activity which is offset by the majority voting achieved in consensus mechanism for each transaction and verification request. The proposed work provides web interface for user queries and analysis of query search time is carried out.","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121835610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Legal Issues and Risks Associated with Cryptocurrency (in Nigeria): Regulation for Use and Integration for Its Possibilities 与加密货币相关的法律问题和风险(在尼日利亚):监管其使用和整合的可能性
International Journal of Blockchains and Cryptocurrencies Pub Date : 1900-01-01 DOI: 10.1504/ijbc.2021.10040472
IbukunOluwa Akinrinde, G. F. Babarınde, O. A. Adewusi, Matthew Oladapo Gidigbi
{"title":"Legal Issues and Risks Associated with Cryptocurrency (in Nigeria): Regulation for Use and Integration for Its Possibilities","authors":"IbukunOluwa Akinrinde, G. F. Babarınde, O. A. Adewusi, Matthew Oladapo Gidigbi","doi":"10.1504/ijbc.2021.10040472","DOIUrl":"https://doi.org/10.1504/ijbc.2021.10040472","url":null,"abstract":"","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123125195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Exploring the relationship between cryptocurrency and S&P500: Evidence from wavelet coherence analysis 探索加密货币与标准普尔500指数之间的关系:来自小波相干性分析的证据
International Journal of Blockchains and Cryptocurrencies Pub Date : 1900-01-01 DOI: 10.1504/ijbc.2023.10049426
Anas Elmalki, Najeh Chaâbane, Riadh Ben Ammar
{"title":"Exploring the relationship between cryptocurrency and S&P500: Evidence from wavelet coherence analysis","authors":"Anas Elmalki, Najeh Chaâbane, Riadh Ben Ammar","doi":"10.1504/ijbc.2023.10049426","DOIUrl":"https://doi.org/10.1504/ijbc.2023.10049426","url":null,"abstract":"","PeriodicalId":137612,"journal":{"name":"International Journal of Blockchains and Cryptocurrencies","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125168653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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