Blockchain is a digital, decentralized, distributed ledger that keeps a record of all transactions that take place across a peer-to-peer network. It is an interlinked and continuously expanding list of records stored securely across a number of interconnected systems. The prerequisite for each transaction to be added to the ledger is the consensus of the network participants (called nodes), thereby creating a mechanism of control regarding manipulation, errors, and data quality.
Key Elements of Blockchain