Blockchain is an incorruptible distributed digital ledger that allows for secure, transparent, and tamper-proof record keeping of economic transactions that can be programmed to record not just financial transactions but virtually everything of value. The Quorum version implements a consensus mechanism called Quorum Chain, which utilizes smart contracts, a voting mechanism, and a time-based, majority-voting algorithm to achieve consensus. The nodes in the Quorum network are categorized as Maker, Voter, or Observer nodes. The chain of blocks created cannot be altered without invalidating all subsequent blocks, and the data stored in the blocks is linked together via cryptography. Open networks are available to everyone to participate in the consensus process blockchains use to validate transactions and data.