BLOCKCHAIN TECHNOLOGY AND THE POSSIBILITIES OF ITS USE

2020. Т. 20, No 3. С. 135–139 135 Introduction In simple terms, blockchain is a database that is stored and updated simultaneously on different devices. Database management is autonomous and decentralized. The database stores and confirms the accuracy of the information and the safety of this data is provided by cryptographic algorithms. Information with this architecture is stored reliably, since many copies of the same data set are simultaneously stored on computers of an unlimited number of users of the entire system. Depending on the order of access to information, system management, participant’s capabilities, a private blockchain and a public blockchain are distinguished. And each type of system is applicable to individual tasks of the project and to different goals [1–5].


Introduction
In simple terms, blockchain is a database that is stored and updated simultaneously on different devices. Database management is autonomous and decentralized. The database stores and confirms the accuracy of the information and the safety of this data is provided by cryptographic algorithms. Information with this architecture is stored reliably, since many copies of the same data set are simultaneously stored on computers of an unlimited number of users of the entire system. Depending on the order of access to information, system management, participant's capabilities, a private blockchain and a public blockchain are distinguished. And each type of system is applicable to individual tasks of the project and to different goals [1-5].

The origin of blockchain technology
There are several versions of the origin of blockchain. The most common version is associated with the development in 2008 by Satoshi Nakamoto of the protocol of the famous Bitcoin cryptocurrency and the alternative infrastructure of the Bitcoin system of the same name. This system is based on the blockchain and quickly entered the business cycle. The second version is historically perhaps more fair. The technology of software processing distributed databases has been known since the 70s of the last century to programmers and mathematicians who took a special course in "Structures and Algorithms for Data Processing" at higher educational institutions. It's just that this cryptographic technology, based on the well-known principles of distributed interaction, was not claimed by the business and the business community until a certain point, since there were other more understandable and affordable mechanisms for doing business. The third version of the origin of blockchain technology has a "spy subtext". Cryptographic data processing algorithms that protect this data from modification and hacking have long been developed and actively implemented in security agencies for military and intelligence purposes [6-10].

Use of blockchain technology
It is worth noting that blockchain is not only cryptocurrency and not only ISEOinternational search engine optimization. Blockchain is also a system for registering rights and assets, for example, registration of copyrights, property rights, certification of transactions, etc. Blockchain technology is used in a broad sense to ensure the safety of the storage, use, retrieval and fixing of any kind of information. The bright areas of its application are the following [11-21]:  transfers of funds and units of virtual currency;  automatic execution of smart contracts [22,23];  confirmation of the origin and identification of complex, special or rare things (objects of art, jewelry);  maintaining a register of assets, including ISEO, a register of rights, facts or actions;  secure and anonymous voting;  conducting trade calculations and logistics;  improvement of the regime of financial transactions and reduce transaction costs. In fact, with a competent approach and reliable observance of the unshakable principles of information reliability and data safety, there is practically no limit to the application of blockchain technology. Blockchain can also be actively used in financial markets, in particular when making cross-border interbank payments, for example, as part of the SWIFT system or its analogues. Blockchain technology is also the basis for such actively developing fields of activity around the world as:  LegalTecha business sector that provides information technology services for professional legal activities and the provision of legal services to consumers using IT;  FinTecha business sector consisting of companies that use technology and innovation to compete with traditional financial institutions represented by banks and intermediaries in the financial services market.
In addition, blockchain as a technology can be the basis for many financial, economic, social and legal processes.

Advantages and disadvantages of blockchain technology
The disadvantages of this technology are mainly technical and legal. For example, there may be doubts about the security of such technology, since the data registry does not have a single control center and can theoretically be hacked. In addition, since the transaction database is not linked to any specific territory or state, the rules for making transactions in different States may cause contradictions and legal conflicts [22]. There are also still open questions about the storage and protection of personal data of participants and users of systems based on blockchain technology, as well as questions about canceling and correcting erroneous or false transactions. At the same time, there is an engineering complexity of modern blockchain solution's architectures [24][25][26].
Speaking about the advantages of this technology, it should be noted, first of all, the functionality: blockchain is a flexible, open technology with potentially wide opportunities, which allows you to automatically conclude many transactions, register facts, which allows you to reduce the time, costs, and operational risks [27][28][29][30].

Conclusion
It is obvious that blockchain technology, as well as global ideas of decentralization, are becoming more and more popular in many areas of public life. Many companies, both in the manufacturing, finan-