Cryptocurrency is a form of digital money that is designed to be secure and, in some cases, anonymous. It is a currency associated with the internet that uses cryptography, the process of converting legible information into an almost uncrackable code, to track purchases and transfers. Cryptocurrencies are entries about token in decentralized consensus-databases. They are not secured by people or by trust, but by math. Cryptocurrencies are used primarily outside existing banking and governmental institutions, and exchanged over the Internet. While these alternative, decentralized modes of exchange are in the early stages of development, they have the unique potential to challenge existing systems of currency and payments.