Blockchain is translated from English as a chain of blocks or a block-chain and represents a distributed database that is used to maintain an ever-growing list of records, called blocks. Each block contains a timestamp and a link to the previous block. The block is usually managed by a peer-to-peer network that collectively adheres to the protocol for testing new blocks. By design, block scheme are inherently resistant to data modification. After recording, the data in any given block can not be changed in hindsight without changing all subsequent blocks and network collusion. The first block code was conceptualized by Satoshi Nakamoto in 2008 and implemented the following year as the main component of the Bitcoin digital currency, where it serves as a public register for all transactions. Today, Blockchain is the principle of cryptocurrency’s work.