Hedera is a public distributed ledger technology built from scratch to support existing and new applications operating at web-scale. Hedera achieves the same result as the most pervasive public blockchains such as Bitcoin or Ethereum, but in a faster, fairer, and more energy-efficient, stable, and secure way. The difference between Hedera and blockchain is that the operations are recorded via a directed acyclic graph( DAG) instead of the chain like in a blockchain network. Hashgraph supports decentralized applications, and it is designed based on an asynchronous Byzantine-Fault Tolerance (aBFT) consensus, which makes the system secure and resistant to any attacks.