What is Blockchain.
Blockchain is a distributed digital ledger. It is an official record-keeper that can be used to verify data transactions over time in a way that is both open and virtually unbreakable. It works by recording transactions (blocks) on multiple specialized servers around the world, creating a distributed record of transactions (the chain) that can be verified against one another to determine authenticity. The only way to tamper with a blockchain is to break into every server containing a copy of the chain at once – not an impossible feat, but extraordinarily difficult for even the most sophisticated hacker.