What is blockchain?

Blockchain is a record-keeping technology designed to make it impossible to hack the system or forge the data stored on the blockchain, thereby making it secure and immutable. It's a type of distributed ledger technology (DLT), a digital record-keeping system for recording transactions and related data in multiple places at the same time.

Each computer in a blockchain network maintains a copy of the ledger where transactions are recorded to prevent a single point of failure.