Connectedness between Gold and Cryptocurrencies in COVID-19 Pandemic: A Frequency-Dependent Asymmetric and Causality Analysis by Zynobia Barson, Peterson Owusu Junior, Anokye M. Adam, Emmanuel Asafo-Adjei

“…Particularly, hedging benefits mostly occur in the short- and medium-term for Bitcoin and Ripple, as well as Bitcoin and Dogecoin in the long-term with gold. …”
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Certain Aspects of the Analysis of Cryptocurrency Transactions during the Prevention and Investigation of Crimes by V. V. Nosov, I. A. Manzhai

“…It has been noted that one of the first and most well-known cryptocurrency is bitcoin. The format of bitcoin address presentation has been described. …”
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Impacts of COVID-19 on the Return and Volatility Nexus among Cryptocurrency Market by Xin Sui, Guifen Shi, Guanchong Hou, Shaohan Huang, Yanshuang Li

“…The results revealed that the total volatility connectedness of the cryptocurrency market markedly increased following the outbreak of COVID-19; statically, Bitcoin, Ethereum, Cardano, and Bitcoin Cash were the net transmitters before COVID-19, while Bitcoin, Ethereum, Ripple, Litecoin, Cardano, and Stellar became the major net transmitters in the market after COVID-19. …”
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Comparison of the asymmetric multifractal behavior of green and U.S. bonds against benchmark financial assets by Werner Kristjanpoller, Benjamin Miranda Tabak

“…Green bonds, however, display nonlinear correlations with Bitcoin and stand out for their distinct upward financial persistence. …”
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Block-based fair payment scheme under delegation computation by Ta LI, Youliang TIAN, Kang XIANG, Hongfeng GAO

“…In the traditional delegation computation,due to the self-interested behavior of both participants,there were some problems such as the denial of the principal and the dishonest calculation by the computing party.In the payment phase,a third party was required to ensure the fairness of the payment,which led to extra costs and risks of disclosure of participants' privacy.Game theory was used to analyze the Nash equilibrium solution between the two parties in the payment process,and a fair payment protocol based on time commitment of bitcoin was proposed.Firstly,the bitcoin time commitment technology was used to ensure the fairness of payment.Secondly,the decentralized feature of block chain was used to replace the third-party service to protect the privacy of all parties and realize the source of responsibility.Finally,the scheme was analyzed from the perspective of security and correctness,which proved that the participants choose behavioral strategies honestly in the payment process.The scheme proposed in this paper not only solved the problem of fair payment in traditional delegation computation,but also protected the privacy of participants.…”
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Cryptocurrency Financial Risk Analysis Based on Deep Machine Learning by Si Chen

“…The proposed method extracted features of related Bitcoin and used the informative ones. Transaction plan considered building nodes in terms of network. …”
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Detecting anomalies in graph networks on digital markets. by Agata Skorupka

“…The article utilized three publicly accessible graph-based datasets: one describing the Twitter social network (TwiBot-20) and two describing Bitcoin cryptocurrency markets (Bitcoin OTC and Bitcoin Alpha). …”
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A Research: Investigation of Financial Applications with Blockchain Technology by Mohammed Ali Mohammed Mohammed, Fuat Türk

“…The results are promising; our models outperform existing studies, achieving impressively low RMSE values of 0.0040 for Bitcoin, 0.028 for Ethereum, and 0.027 for Binance Coin. …”
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Medición de la compensación del riesgo en el mercado de criptomonedas - Measuring risk compensation in the cryptocurrency market by Andrés Caicedo Carrero, Jorge Alexander Cortés Cortés, Wilmar Arnulfo Bravo Murillo, Myriam Aydee Moreno Garzón

“…Objetivo: examinar el rendimiento ajustado al riesgo de Bitcoin, Ethereum, Tether y Binance frente al S&P 500, determinando su capacidad para superar el mercado mediante el Alpha de Jensen. …”
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Fraud Detection in Cryptocurrency Networks—An Exploration Using Anomaly Detection and Heterogeneous Graph Transformers by Víctor Pérez-Cano, Francisco Jurado

“…This article will address the problem of identifying fraud cases among a large set of transactions extracted from the Bitcoin network. More specifically, our study’s goal was to find reliable techniques to label Bitcoin transactions, taking into account their features. …”
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Cryptocurrency as an investment or speculation: a bibliometric review study by Sakshi Vasudeva

“…Design/methodology/approach – The study analyzed literature published in the English language from 2012 onwards that used the words “cryptocurrency”, “Ethereum” “Bitcoin” along with “investment/s” or “speculation/s” in the Title/ABS/KEY. …”
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Minage de cryptomonnaies à Irkoutsk by Hugo Estecahandy

“…This process of creating some digital currencies, including the bitcoin, requires significant computing power and therefore special resources. …”
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Survey of quantum crypto currency by Heng-yue JIA, Xia WU, Jian-ming ZHU

“…The development history of quantum crypto currency was explained briefly, and different kinds of quantum crypto currency (including quantum bank note, quantum coin, quantum check, and quantum Bitcoin) respectively from the aspects of basic scheme models, security requirements, key technologies and research progress were introduced. …”
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Survey of block chain by Xin SHEN, Qing-qi PEI, Xue-feng LIU

“…With the wide spread of Bitcoin,block chain serving as the building block of digital currency becomes a hot spot in industry and academia.Due to the decentration of network,the unforgeability of block data,etc.…”
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Developing Countries and Blockchain Technology: Uganda’s Perspective by Ivan, Niyonzima, Ruth Wario, Emmanuel Ahishakiye

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Multiscale Systemic Risk and Its Spillover Effects in the Cryptocurrency Market by Xu Zhang, Zhijing Ding

“…Since the advent of Bitcoin, the cryptocurrency market has become an important financial market. …”
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Supply chain dynamic multi-center coordination authentication model based on block chain by Jian-ming ZHU, Yong-gui FU

“…The value of block chain technology is proved by the success of Bitcoin. The characteristics, limitations and its chain structure Hash principle of block chain were analyzed, the applications of block chain technology were researched, the B2B+B2C supply chain each transaction subject transaction structure diagram and dynamic multi-center coordination authentication model based on block chain were proposed. …”
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Nicolas Laurence, La contestation portée par les innovations monétaires comme moteur de changement institutionnel. Le cas des monnaies locales et des cryptomonnaies by Nicolas Laurence

“…Local currencies convey a monetary contestation focused on social aspects and ecology at the territorial and local level, while cryptocurrencies, whose Bitcoin is the most emblematic initiative, thanks to the blockchain technology, contest the monetary system by offering transnational alternatives. …”
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Crypto Currency Price Forecast: Neural Network Perspectives by Yuriy Kleban, Tetiana Stasiuk

“…Using the example of data from Binance (the most popular exchange in Ukraine) for the period from 06.07.2020 to 01.04.2023, prices for Bitcoin, Ethereum, Ripple, and Dogecoin were modeled and forecasted. …”
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Optimized scalable Byzantine fault tolerance algorithm by Sicheng HAN, Xiaorong ZHU, Xiuxian ZHANG

“…Blockchain is a decentralized ledger which provides trust to both parties which distrust each other in a transaction.Blockchain initially served as the underlying framework that underpins bitcoin and has increasingly become a disruptive new technology in recent years.Consensus algorithm is one of the core technologies of blockchain.Without a consensus algorithm,the state consistency among distributed nodes cannot be achieved.The practical Byzantine fault tolerance (PBFT) algorithm was briefly introduced,which was a commonly used consensus algorithm in consortium blockchain.An optimized and scalable algorithm based on it was proposed.The improved algorithm mainly reduced the algorithm complexity and allowed consensus nodes to join and exit the system.Simulation results show that the improved algorithm can significantly reduce the transaction consensus completion time and the number of communication times between nodes,so as to increase the throughput of the whole system while supporting more nodes and reducing the system communication overhead and CPU computing resource consumption.…”
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