The University of SydneyPage 11Distributed implementation of a blockchainIt implements a distributed ledger that is –Immutable: transactions can only be appended to the ledger –Pseudonymous: participants are identified by their address (pseudonym)It uses:–A Gossip-based protocol for maintaining an overlay–Peer-to-peer network where peers are both clients and servers (miners)–Public key cryptosystem, participant sign their transactions–Consensus for the distributed system to decide a block at index I