Financial technology (FinTech) is the new business model and technology which aims to compete with traditional financial services and blockchain is one of most famous technology use of FinTech. Blockchain is a type of distributed, electronic database (ledger) which can hold any information (e.g. records, events, transactions) and can set rules on how this information is updated. The most well-known application of blockchain is bitcoin, which is a kind of cryptocurrencies. But it can also be used in many other financial and commercial applications. A prominent example is smart contracts, for instance as offered in Ethereum. A contract can execute a transfer when certain events happen, such as payment of a security deposit, while the correct execution is enforced by the consensus protocol. The purpose of this paper is to explore the research and application landscape of blockchain technology acceptance by following a more comprehensive approach to address blockchain technology adoption. This research is to propose a unified model integrating Innovation Diffusion Theory (IDT) model and Technology Acceptance Model (TAM) to investigate continuance intention to adopt blockchain technology.
Chris Reed, Uma M Sathyanarayan, Shuhui Ruan, Justine K. Collins
Blockchain technology allows the creation of distributed ledgers. These distribute control among the players rather than requiring a centralized database, and so can reduce costs and speed-up transactions. However, when it is used for assets which exist outside the blockchain itself, an unmodified adoption of the technology would bypass legal and regulatory requirements which, for these kinds of assets, cannot be bypassed without fundamental change to the law. Building those requirements into any blockchain-based system introduces features which are not necessary for performing its core functions, and we call these âlegal impuritiesâ. The most important legal impurities required are those relating to identification of the parties, and introducing the ability of a trusted third party to make modifications to the ledger. Not only does introducing these legal impurities make fundamental changes to the concept behind blockchain, but it is also essential that they are implemented in ways which do not threaten the integrity of the blockchain as evidence. This article has been produced by members of the Microsoft Cloud Computing Research Centre, a collaboration between the Cloud Legal Project, Centre for Commercial Law Studies, Queen Mary University of London and the Computer Laboratory, University of Cambridge. The authors are grateful to members of the MCCRC team and to attendees at the fourth Annual MCCRC Symposium (Windsor, September 2017) for helpful comments and to Microsoft for the generous financial support that has made this project possible. Responsibility for views expressed, however, remain with the authors.
Kristoffer NÌrland, Christoph Mßller-Bloch, Roman Beck, Søren Palmund
Many decentralized, inter-organizational environments such as supply chains are characterized by high transactional uncertainty and risk. At the same time, blockchain technology promises to mitigate these issues by introducing certainty into economic transactions. This paper discusses the findings of a Design Science Research project involving the construction and evaluation of an information technology artifact in collaboration with Maersk, a leading international shipping company, where central documents in shipping, such as the Bill of Lading, are turned into a smart contract on blockchain. Based on our insights from the project, we provide first evidence for preliminary design principles for applications that aim to mitigate the transactional risk and uncertainty in decentralized environments using blockchain. Both the artifact and the first evidence for emerging design principles are novel, contributing to the discourse on the implications that the advent of blockchain technology poses for governing economic activity.
Open access
Complex Systems and Decision Making
Innovative Approaches in Technology and Social Development
Bitcoin is an open source payment system with a market capitalization of about 15 G$. During the years several key management solutions have been proposed to enhance bitcoin. The common characteristic of these techniques is that they allow to derive public keys independently of the private keys, and that these keys match. In this paper we overview the historical development of such techniques, specify and compare all major variants proposed or used in practical systems. We show that such techniques can be designed based on 2 distinct ECC arithmetic properties and how to combine both. A major trend in blockchain systems is to use by Stealth Address (SA) techniques to make different payments made to the same payee unlikable. We review all known SA techniques and show that early variants are less secure. Finally we propose a new SA method which is more robust against leakage and against various attacks.
Open access
Blockchain Technology Applications and Security
Advanced Steganography and Watermarking Techniques
Cryptocurrencies allow users to securely transfer money without relying on a trusted intermediary, \nand the transparency of their underlying ledgers also enables public verifiability. This openness, \nhowever, comes at a cost to privacy, as even though the pseudonyms users go by are not linked to their \nreal-world identities, all movement of money among these pseudonyms is traceable. In this paper, \nwe present M¨obius, an Ethereum-based tumbler or mixing service. M¨obius achieves strong notions of \nanonymity, as even malicious senders cannot identify which pseudonyms belong to the recipients to \nwhom they sent money, and is able to resist denial-of-service attacks. It also achieves a much lower \noff-chain communication complexity than all existing tumblers, with senders and recipients needing \nto send only two initial messages in order to engage in an arbitrary number of transactions.
Cryptocurrency is a digital currency designed to work as a medium of exchange using cryptography to secure the transactions, to control the creation of additional units, and to verify the transfer of assets. The objective of this study is to evaluate the volatility condition for cryptocurrency (Bitcoin) exchange rate and return. Volatility calculated as standard deviation of logarithmic returns. This study performed normality test using Shapiro-Wilk method. Then, the high volatility detection performed using box-whisker plot and statistical process control chart. In descriptive statistical analysis, the mean for Bitcoin return is 0.006 and the deviation is 0.04458. The standard error indicates the volatility for Bitcoin is 4.458 %. This value is considered as high value of volatility.High value of volatility indicates the investment in Bitcoin is categorical as high risk investment. The important of this study is to assist investors to develop better investment portfolio in targeting better profit and lowering the loss
Bitcoin is a type of crypto-currency that was launched in January 2009 as an emerging digital phenomenon in the financial technology realm by an unknown computer scientist using the pseudonym Satoshi Nakamoto. It is an innovative and independent currency that uses cryptography for its creation and for performing secure transactions. The aim of this article is targeted to introducing into the bitcoin's technology. The survey results and empirical research show that despite the bitcoin benefits over the currency of central authority people do not believe in this crypto-currency because of its speculative character.
Best known for their role in the creation of cryptocurrencies like bitcoin, blockchains are revolutionizing the way technology entrepreneurs finance their business enterprises. In 2017 alone, tech entrepreneurs raised over $6 billion through the sale of blockchain-based digital tokens, with some sales lasting mere seconds before selling out. In a token sale, also referred to as an âinitial coin offeringâ or âICO,â organizers of a project sell digital tokens to members of the public to finance the development of new technological platforms and services. After the initial sale, cryptocurrency exchanges scattered across the globe list tokens for trading and facilitate an active secondary market in which wild price fluctuations are common.\nThe recent explosion of token sales could mark the beginning of a broader shift in public capital markets. Blockchains drastically reduce the cost of exchanging value and enable anyone to transmit digitized assets around the globe in a highly trusted manner, stoking dreams of truly global capital markets that leverage the power of a blockchain and the Internet to facilitate capital formation. Lacking homogeneity, the status of tokens under U.S. securities laws is unclear. Although the SEC recently issued a Report of Investigation and has initiated several enforcement actions in which it has found that tokens are securities, confusion still surrounds the boundaries between the types of tokens that will be treated as securities and those that will not.\nIn this Article, we argue that the SEC and Congress should provide token sellers and the exchanges that facilitate token sales with additional regulatory certainty and a sensible path to compliance. Specifically, we outline extrinsic and intrinsic factors that courts and regulators should consider when applying the Howey test to digital tokens, adoption of which would help resolve the uncertainty surrounding tokens that mix aspects of consumption and use with the potential for profit. We further propose that lawmakers adopt both a compliance-driven safe harbor for online exchanges that list tokens with a reasonable belief that the public sale of such tokens is not a violation of section 5 of the Securities Act of 1933 as well as an exemption to the section 5 registration requirement that has been tailored to digital tokens.
Modern law makes currency a creature of the state and ultimately the value of its currency depends on the publicâs trust in that state. While some nations are more capable than others at instilling public trust in the stability of their monetary institutions, it is nonetheless impossible for any legal system to make the pre-commitments necessary to completely isolate the governance of its money supply from political pressure. This proposition is true not only today, where nearly all government institutions manage their money supply in the form of central banking, but also true of past private banking regimes circulating their notes under the shadow of public law. However, bitcoin represents a potential third currency regime far more resistant to state control because it mints currency units that exist in no physical place, places a numerical ceiling on the number of units that can be created, and relies on scientific principles from cryptography to guarantee that ceiling and verify any person-to-person transfer. The trust required is not in any government but in the decentralized order of those who verify bitcoin transactions and those who create the software these verifiers choose to run on their connected computers.\nThis Article explores the fundamental structure of bitcoin, first by demystifying it as a technology, and second by showing how its decentralized order contrasts with other currency regimes. Unlike governments that use the power of law to compel action, bitcoin relies on a system of built-in incentives to encourage behavior that benefits not only those seeking to use bitcoin, but also bitcoin minersâthose who voluntarily undertake the task of maintaining the payment network. While currently bitcoin is too volatile to compete with all but the worst government-issued currencies, the qualities of this system may give bitcoin a long-term advantage over many currencies. As the bitcoin ecosystem continues to grow, its nonlegal order can help it climb the rungs of stability created by distrust in government.\nThe technology underpinning bitcoin is the next point of innovation in the digital ageâthe same era that has already seen software create institutional disruption from Amazon, Facebook, and Uber, among many others. As bitcoin gains in popularity, it offers a platform for other kinds of technological alternatives to traditional legal regimes, like smart contracts. Bitcoinâs order without currency law will facilitate other forms of order with less law.\nThis is a propitious time for fundamental examination of bitcoin. Despite experiencing significant speculation and volatility throughout late 2017 and early 2018, its ten-year history demonstrates a downward trend in volatility and an upward trend in market capitalization.
Alessandra Cretarola, Gianna Figg-Talamanca, Marco Patacca
In recent literature it is claimed that BitCoin price behaves more likely to a volatile stock asset than a currency and that changes in its price are influenced by sentiment about the BitCoin system itself; in Kristoufek [10] the author analyses transaction based as well as popularity based potential drivers of the BitCoin price finding positive evidence. Here, we endorse this finding and consider a bivariate model in continuous time to describe the price dynamics of one BitCoin as well as a second factor, affecting the price itself, which represents a sentiment indicator. We prove that the suggested model is arbitrage-free under a mild condition and, based on risk-neutral evaluation, we obtain a closed formula to approximate the price of European style derivatives on the BitCoin. By applying the same approximation technique to the joint likelihood of a discrete sample of the bivariate process, we are also able to fit the model to market data. This is done by using both the Volume and the number of Google searches as possible proxies for the sentiment factor. Further, the performance of the pricing formula is assessed on a sample of market option prices obtained by the website deribit.com.
Abstract Distributed ledger technology, a variant of which is blockchain technology, represents one of the most important innovations of the FinTech revolution. Academics, policy-makers, and market participants are experimenting with the technology with the aim of enhancing the functioning of financial markets. Industry consortia are being formed by the biggest financial institutions in the world seeking to leverage the use of the technology, in order to improve the clearing and settlement process. Furthermore, central banks in advanced and developing economies are examining the potential of using the technology in market infrastructures operated by central banks and are even exploring the possibility of issuing digital base money. Nevertheless, the widespread adoption of distributed ledger technology as envisioned by its ardent supporters encounters considerable legal obstacles, including the numerous new regulations imposed on financial markets and market participants in the aftermath of the Global Financial Crisis. This chapter seeks to disentangle the myths from the realities of the so-called distributed ledger technology or blockchain revolution and discusses how the legal regime can act both as an impediment and a catalyst to the widespread adoption of the technology.
The study attempted to investigate how leadership can be used to combat corruption in decentralized governance structures of Ghana. In conducting the study, purposive sampling technique was employed to select key officials of GA south municipal assembly whose duties often promote corrupt practices. The questionnaire technique was the research instrument while a statistical package for social science was used to facilitate the analysis of data captured from the field. Findings of the study noted that under invoicing, over invoicing, payment for works not done among others are serious corrupt practices prevailing within the decentralized grassroots governance structures. It also came to light that political interference, appointing political operatives to key positions in governance units all promotes corrupt practices. The study noted that if political interference can be removed in the administration of these decentralized structures, effective leaders who are mainly technocrats can offer sound management framework for carrying out the developmental agenda of these decentralized structures. The study called on government of African countries to endeavour to finance the activities of political parties so as to remove the need for amassing wealth through fair or foul means for strengthen political structures to win elections. Strong leaders are required towards combating corruptions, however there is the need to ameliorate completely the effect of political interference in the administration of decentralized governance structures.