Blockchains are an open, ledger that can record transactions between two parties efficiently and that provides a secure way of making and recording transactions, agreements and contracts

The blockchain is an advanced form of Database storage system, which uses ``records`` or ``blocks`` to store data or information. These records or blocks get duplicated automatically with the mechanism of cryptography, thus providing a more secure data storage platform. Blockchain is the technology which supports the cryptocurrencies and Digital currencies such as Bitcoin and Ethereum.