Blockchain is a decentralized ledger of all transactions across a peer-to-peer network that allows participants to perform transactions without a central authority. Potential applications include fund transfers, settling trades, voting and more. Blockchain ensures "cash like" coin passing that is unique, immutable and final. Bitcoin was the first blockchain application and is an unregulated, censorship-resistant shadow currency. Blockchain can open up business networks by reducing costs, improving efficiencies and increasing accessibility through faster transaction settlements, transparency, reduced transaction costs and decentralization without third parties.