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Cryptocurrency as a legal category and its regulation
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Bibliographic description of the article for the citation:

. Cryptocurrency as a legal category and its regulation//Science online: International Scientific e-zine - 2022. - №5. - https://nauka-online.com/en/publications/jurisprudence/2022/5/02-8/

Annotation: The article examines current trends in the development of virtual assets, in particular cryptocurrencies, in Ukraine and the world in terms of legal policy to ensure their functioning on the basis of political and legal decisions against the background of analyzing the development of such assets. The basic information on the current situation of virtual assets, and, in particular, cryptocurrencies, on the world market and the legal provisions governing the legal relations arising from the use of such assets has been systematized. The main trends in the development of the sphere and further directions of regulation of virtual assets on the basis of temporal progress and comparison with related legal and economic categories are described. Prospects for the use of virtual assets both in Ukraine and in other countries and further interaction between the above assets and established financial government systems are outlined.

Keywords: AML/CFT policies authorized body blockchain cryptocurrency cryptocurrency extraction KYC legal regulation of cryptocurrencies NFT-токен virtual assets блокчейн віртуальні активи добування криптовалют криптовалюта правове регулювання криптовалют уповноважений орган
Categories: Jurisprudence
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Hash function for using in cryptocurrencies
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Bibliographic description of the article for the citation:

. Hash function for using in cryptocurrencies//Science online: International Scientific e-zine - 2021. - №12. - https://nauka-online.com/en/publications/technical-sciences/2021/12/38-3/

Annotation: Hash functions have many properties that make them relevant for use in many modern algorithms. In particular, the operation of cryptocurrencies is based on the use of hashing. In this article, we'll take a look at how the SHA-256 algorithm works. As well as the goals of mining and the use of hash functions to solve this problem.

Keywords: bitcoin blockchain collision cryptocurrency hash-function блокчейн колізія коллизия криптовалюта хеш-функція
Categories: Technical sciences
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The role of cryptocurrencies in financial and economic systems
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Bibliographic description of the article for the citation:

. The role of cryptocurrencies in financial and economic systems//Science online: International Scientific e-zine - 2020. - №2. - https://nauka-online.com/en/publications/economy/2020/2/mesto-kriptovalyuty-v-finansovo-ekonomicheskoj-sisteme/

Annotation: The article is devoted to the actual problem of cryptocurrency functioning in the world market and its place in financial and economic systems. The emergence of virtual money (cryptocurrency) is driven by the constant development of technology and the economy. Currently, non-cash payments are more common. Cryptocurrency is becoming an innovative form of payment in the information society. Unlike traditional types of money, it can be a means of payment in electronic payment systems with a high level of protection against cybercrime. Every day, cryptocurrency is strengthening its role not only as a way of saving, but also as a means of payment in electronic payment systems. Purpose. Themain purpose of the study is to determine the place and role of cryptocurrency in financial and economic systems. Results. The experience of implementing and using cryptocurrencies and models of their regulation have been investigated, on the example of European countries. It has been found that the functioning of cryptocurrencies is a new challenge for government regulators of financial services markets. The cryptocurrencies most popular by their capitalization are compared. The strengths and weaknesses of virtual money, and the threats and prospects of their use in the financial and economic world market are identified. Further perspectives on the use of cryptocurrency at the country level and the ways to improve its position in the world economic system were substantiated. Conclusions. Analysed data in this article makes it possible to determine what a cryptocurrency is and its role in the financial and economic system. Cryptocurrency is a fairly new concept that has adapted to the current financial and credit system and is constantly evolving. Digital money has a future as it is very convenient not only for the average person but also for the whole country. It is possible to remove the drawbacks by developing effective laws regarding the use of cryptocurrency and the regulation of the rights and obligations of its users. In the future, thanks to transaction transparency and protection against virtual currency fraud, it can significantly reduce the level of corruption, drug business and the percentage of the shadow economy.

Keywords: bitcoin blockchain cashless payments cryptocurrency electronic money fiat money virtual currency безготівкові розрахунки безналичные расчеты биткоин біткоїн блокчейн виртуальная валюта віртуальна валюта електронні гроші криптовалюта фиатни деньги фіатні гроші электронные деньги
Categories: Economy
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Extension of blockchain technology in different branches
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Bibliographic description of the article for the citation:

. Extension of blockchain technology in different branches//Science online: International Scientific e-zine - 2019. - №12. - https://nauka-online.com/en/publications/economy/2019/12/poshirennya-blokchejn-tehnologiyi-v-riznih-galuzyah/

Annotation: The article identifies and analyzes the diffusion of blockchain technologies in various business areas. Common scientific methods are used: analysis and synthesis; induction and deduction; analogy and modeling; abstraction and concretization; system analysis. The study identified the impact of blockchain on business performance and the subsequent impact on average citizens. The author has defined new criteria for systematization and improvement of business using blockchain technologies in modern realities. The researches and analyzes carried out help to correctly evaluate and understand the essence of the basic principles and system of introduction of blockchain systems in projects.

Keywords: bitcoin blockchain cryptocurrency development integration optimization transaction біткойн блокчейн інтеграція ІТ криптовалюта оптимизация розробка транзакція
Categories: Economy
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