Blockchain is a type of distributed ledger for maintaining a permanent and tamper-proof record
of transactional data. A blockchain functions as a decentralized database that is managed by
computers belonging to a peer-to-peer (P2P) network.A blockchain, originally block chain, is a
growing list of records, called blocks, which are linked using cryptography. ... It is "an open,
distributed ledger that can record transactions between two parties efficiently and in a verifiable
and permanent way".