Blockchains

A blockchain has been defined as “a continuously growing list of records, called blocks, which are linked and secured using cryptography” (https://en.wikipedia.org/wiki/Blockchain) and as a “digital, decentralised, distributed ledger” (https://medium.com/@cryptoeconomics/the-blockchain-economy-a-beginners-guide-to-institutional-cryptoeconomics-64bf2f2beec4)