Distributed Ledger

A ledger is simply a list of account transactions. You can look at any accounting application you have ever used – or even your bank statement – to see a simple, chronological list of your transaction history in any account.

A distributed ledger is simply a ledger… that is distributed (or spread across) multiple different devices. BlockchainBlockchain is the technology that underlies cryptocurrency. Not just Bitcoin, but all of them. Blockchain is a kind of ... itself is a kind of distributed ledger.

This makes the transaction history decentralized because it is spread all over the network. It means no single party can manipulate the ledger because that would require changing the records across every single nodeBlockchain is powered by a large network of miners. Those miners can be either single computing devices... or entire far... that holds a copy of that ledger.