The last hundred years of world history were marked by rapid development of the financial and banking sphere, which predetermined the emergence of electronic money. Many economists are inclined to believe that the paper money in general disappear in the future, and be replaced by electronic money, i.e, essence of money remains the same, but their form will be changed: money will be transferred to the sphere of virtual reality, will become "invisible". The place of electronic money in modern monetary theory is still ambiguous, but in practice, virtual cash is rapidly becoming the currency of the world economy and its financial markets. Transformation of money types is conditioned by the influence of the permanent development of society.With the invention of the first PCs at the end of the last century, along with popularization of the Internet, a new stage in the development of both technologies and the whole humanity began. It took just 20 years for the Internet to fully take root in our lives, and now, modern people don`t imagine their life without it. Technology does not stand still, and now even the most simple smartphone is already superior to the power of computers of 80-90s, which allows, in addition to the increased speed of the internet, to use these products in all modern fields of human activities, ranging from economy and ending the entertainment industry.Bitcoin in 2009 marked another stage in human development - the generation of decentralized digital currencies, created and operated only on the Internet, was appeared. Not only Bitcoin became the revolutionary innovation, but also blockchain which it runs on. Blockchain is undoubtedly one of the most significant inventions along with the computer and the Internet - is a breakthrough with a very large-scale consequences that afect not only the sphere of finance, but also many other industries. Already today you can see how many small and large organizations are moving to blockchain. Nowadays, every company is connected to the outside world via the Internet and while digital data has revolutionized the way organizations go, hackers find opportunities to substitute or steal customer data and commit fraudulent transactions. To protect information governments had provided tightening of identification of person in the form of Know Your Customer (KYC) and Customer Identification Program (CIP).Blockchain is going to help us to solve all of these problems. It is a distributed database, which has a storage device not connected to a common server. This database stores the growing list of ordered records, called blocks. Each unit contains a time stamp and a link to the previous unit. Encryption ensures that users can change only those parts of the chain blocks, which they "own", in the sense that they have private keys, without which the record in the file is not possible. All the information is stored in the blockchain and it can not be forged or deleted. The widespread implementation of the blockchain in all modern industries will allow to get rid not only from hackers, but also from corruption. Application of the blockchain in education is going to exclude the possibility of forgery of diplomas and to simplify the proof of the legitimacy of the same diploma that will eliminate in the future work of the unskilled or conforming their ofce staf. Now such a huge company, as IBM (one of the world's largest manufacturers and suppliers of hardware and software), and Maersk (Danish company, operating in various sectors of the economy, for the most part known to the port and freight shipping business) announced plans to establish a joint venture to provide more efcient and safe methods for conducting global trade with the use of blockchain technology. There are many similar examples.In the same time, we lost confidentiality. Not a long time ago it was considered Bitcoin is completely anonymous, but in fact it’s not. Companies such as Bitfury Group now can interlink addresses and this feature is called "clustering".Clustering of bitcoin-adresses is the process of uncovering Bitcoin users by analyzing the data of the blockchain. So, besides analyzing of the blockchain, data outside the chain will be considered and collated, for example, public information on the Internet. It means, that it will help researchers to minimize mistakes, untrusted sources and will give them the greatest accuracy of results. Biftury focuses on the struggle with criminals, but it is necessary to understand that this way to deanonymization can be applied to any of Bitcoin owners.
