CRYPTO CURRENCY : A digital medium of exchange using cryptography on a ledger to secure transactions and to verify transfer of ownership
A cryptocurrency is a type of currency which uses digital files as money . Usually, the files are created using the same ways as cryptography (the science of hiding information). Digital signatures can be used to keep the transactions safe, and let other people check that the transactions are real. [1] [2] [3] The first cryptocurrencies were made to be free of government-given currencies. Cryptocurrencies use ' decentralized control'. [4] That means that government can not control cryptocurrencies. This is different to 'centralized' electronic money and central banks . [5] The control of each cryptocurrency works through a distributed ledger (a list of transactions shared by everyone), usually a blockchain , [6] that serves as a public financial transaction database. [7] Bitcoin , first released as open-source software ...