Cryptocurrencies are supported by a technology known as blockchain, which maintains a tamper-resistant record of transactions and keeps track of who owns what. The use of blockchains addressed a problem faced by previous efforts to create purely digital currencies: preventing people from making copies of their holdings and attempting to spend it twice[1].Individual units of cryptocurrencies can be referred to as coins or tokens, depending on how they are used. Some are intended to be units of...

Cryptocurrencies are supported by a technology known as blockchain, which maintains a tamper-resistant record of transactions and keeps track of who owns what. The use of blockchains addressed a problem faced by previous efforts to create purely digital currencies: preventing people from making copies of their holdings and attempting to spend it twice[1].Individual units of cryptocurrencies can be referred to as coins or tokens, depending on how they are used. Some are intended to be units of...