121 research outputs found

    Philosophy of Blockchain Technology - Ontologies

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    About the necessity and usefulness of developing a philosophy specific to the blockchain technology, emphasizing on the ontological aspects. After an Introduction that highlights the main philosophical directions for this emerging technology, in Blockchain Technology I explain the way the blockchain works, discussing ontological development directions of this technology in Designing and Modeling. The next section is dedicated to the main application of blockchain technology, Bitcoin, with the social implications of this cryptocurrency. There follows a section of Philosophy in which I identify the blockchain technology with the concept of heterotopia developed by Michel Foucault and I interpret it in the light of the notational technology developed by Nelson Goodman as a notational system. In the Ontology section, I present two developmental paths that I consider important: Narrative Ontology, based on the idea of order and structure of history transmitted through Paul Ricoeur's narrative history, and the Enterprise Ontology system based on concepts and models of an enterprise, specific to the semantic web, and which I consider to be the most well developed and which will probably become the formal ontological system, at least in terms of the economic and legal aspects of blockchain technology. In Conclusions I am talking about the future directions of developing the blockchain technology philosophy in general as an explanatory and robust theory from a phenomenologically consistent point of view, which allows testability and ontologies in particular, arguing for the need of a global adoption of an ontological system for develop cross-cutting solutions and to make this technology profitable. CONTENTS: Abstract Introducere Tehnologia blockchain - Proiectare - Modele Bitcoin Filosofia Ontologii - Ontologii narative - Ontologii de intreprindere Concluzii Note Bibliografie DOI: 10.13140/RG.2.2.24510.3360

    Transnational Political Regulation of Bitcoin

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    Virtual currencies have recently emerged at the intersection of Internet and finance, bringing unprecedented innovations in payment systems, money and finance. In particular, Bitcoin is examined as the first example of virtual currency, dating back to 2009. Ever since virtual currencies emerged, they received increased attention from public, private and societal regulators, especially in the field of finance. Since regulation of Bitcoin is still in its infancy, this project will rather aim to unpack the underlying rationalities of power. Employing the concept of governmentality, this thesis performs Critical Discourse Analysis on policy papers, statements and press releases from public, private and societal regulators of finance. Rationalities of power and regulation are unpacked along three categories: ideas over the object that has to be regulated; ideas over the objectives that regulation has to achieve; ideas over the technical tools to be employed to achieve said aims. The results envision a future in which regulation will be public, transnational and permissive. The attitude of regulators is aimed at co-opetition, understood as a mix of competition and co-optation of virtual currencies in the current paradigm of regulation of money and finance. The future scenario will be mostly decided by strategic employment of material and institutional power by public and private actors in order either to limit or to support the adoption and diffusion of virtual currencies. However, it seems unlikely that virtual currencies will simply vanish in the future

    ANALYZING THE PRIVACY AND SECURITY OF PROOF-OF-WORK CRYPTOCURRENCIES

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    Drivers Affecting Bitcoin Adoption as a Payment Mechanism in the Tourism Industry

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    The authors received no financial support for the research, authorship and, or publication of this article.While travelers' desire to visit the world's most remote places has grown, the inefficiency of global payments indicates a significant barrier to tourism growth. As an emerging, decentralized, and borderless digital innovation, Bitcoin technology seems to have the ability to serve as a payment alternative and address such fundamental inefficiencies. On the other hand, bitcoin adoption can only happen when tourists and business owners choose to operate bitcoin simultaneously. The study has developed a novel Bitcoin Collaborative Network and Tourism Collaborative Network model to examine Bitcoin adoption factors. Then a fuzzy DEMATEL method was applied to the factors influencing the adoption domain, as identified based on an extensive literature review, in-depth interviews, and an international Delphi process. The study offered a model for the heterogeneous collaborative network of Bitcoin and Tourism (BCN and TCN), revealing that Perceived Usefulness is the most influencing criterion and the most prominent variable in Bitcoin Adoption. Bitcoin Technological Complexity, Government Regulatory, and Bitcoin Awareness are the factors that give the highest impacts. Also, Bitcoin's Technological Complexity is the most significant factor in bitcoin adoption. The findings might assist businesses in adopting a new market expansion strategy and benefiting from technological spillover, while government officials can explore new supporting legislation.publishersversionpublishe

    Speed-Security Tradeoffs in Blockchain Protocols

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    Transaction processing speed is one of the major considerations in cryptocurrencies that are based on proof of work (POW) such as Bitcoin. At an intuitive level it is widely understood that processing speed is at odds with the security aspects of the underlying POW based consensus mechanism of such protocols, nevertheless the tradeoff between the two properties is still not well understood. In this work, motivated by recent work \cite{GKL15} in the formal analysis of the Bitcoin backbone protocol, we investigate the tradeoff between provable security and transaction processing speed viewing the latter as a function of the block generation rate. % We introduce a new formal property of blockchain protocols, called {\em chain growth}, and we show it is fundamental for arguing the security of a robust transaction ledger. % We strengthen the results of \cite{GKL15} in the following ways: we show how the properties of persistence and liveness of the ledger reduce in a black-box fashion in the underlying properties of the backbone protocol, namely common prefix, chain quality and chain growth, and we improve the security bounds showing that the robustness of the ledger holds for even the faster (than Bitcoin\u27s) block generation rates which have been adopted by other ``alt-coins.\u27\u27 % We also present a theoretical attack against bitcoin which we validate in simulation that works when blockchain rate is highly accelerated. This presents a natural upper bound in the context of the speed-security tradeoff. By combining our positive and negative results we map the speed/security domain for blockchain protocols and list open problems for future work

    Low on Trust and High on Risks: Is Sidechain a Good Solution to Bitcoin Problems?

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    Over the past few years, cryptocurrencies (especially Bitcoin) have attracted a particular attention. As the number of transactions increase, these systems tend to become slower, expensive, and unsustainable for a use-case such as payment. In this way, the Bitcoin sidechain seeks to provide prompt and confidential transactions between major trading platforms. Although poor performance and high volatility can push potential users away from Bitcoin, this study reveals that the introduction of sidechain solves some of the problems Bitcoin is facing. Using relatively new techniques, we find that the implementation of sidechain reduces Bitcoin price volatility, rises its efficiency, and enhances its usefulness as a transaction tool and a diversifier. We explain these changes in Bitcoin characteristics by the sidechain"s capacity to speed up the circulation of money by shortening block validation times and to an improvement in the scalability of Proof of Work and Bitcoin payment services. Our results also indicate that the sidechain liquid network lead to a less energy-consuming and in turn to less polluting Bitcoin system. But a weakly vanishing causality between Bitcoin mining and Bitcoin energy consumption implies that the concentration of miners is still follow available electrical supply

    Is bitcoin a good investment asset?

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    Mestrado Bolonha em Economia Monetária e FinanceiraThis dissertation aims to analyze the consequences of adding Bitcoin to an in- vestment portfolio. The main methodology used is the Mean-Variance model combined with the Monte Carlo Simulation. Results show that Bitcoin can im- prove the Sharpe Ratio of an already diversified portfolio, however the inclusion of Bitcoin has to be done in proportions averaging 3.83% of the portfolio’s weight. This dissertation also found that Bitcoin does not seem to behave as a safe haven/hedge asset during the Covid-19 pandemic.info:eu-repo/semantics/publishedVersio
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