Crypto currency ( cryptocurrency ) is a digital payment instrument that is safe from acts of forgery, copying or alteration. Each virtual coin has a special number, with crypto currency transactions carried out anonymously using a special key. Transactions that have been made cannot be canceled.
Information about the transaction is usually available openly. For example, bitcoin - the most popular crypto currency -, the information is presented in the form of a chain of blocks of continuous transactions, where each last block stores data from the block that was previously valid, it aims to ensure the continuity of the network.