A blockchain is a digital ledger of all cryptocurrency transactions. It is constantly growing as “completed” blocks are added to it with a new set of recordings. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data. Bitcoin nodes use the block chain to differentiate legitimate Bitcoin transactions from attempts to re-spend coins that have already been spent elsewhere.
Some of the emerging trends in Blockchain technology include the use of Blockchain for supply chain management, the use of Blockchain for identity management, and the use of Blockchain for data management.