Permissioned Ledger

A Permissioned Ledger is a type of blockchain network which requires explicit permission from individuals or a group of individuals to view or access the ledger. This is in stark contrast to a public ledger such as Bitcoin or Ethereum, which anybody can access without any permission. A permissioned ledger can have one or many owners. Consensus on a permissioned ledger is not achieved through either Proof of Work (PoW) or Proof of Stake (PoS). An agreement is reached when the authorized, trusted, and approved actors who have been granted access to the ledger add or remove data. Permissioned ledgers are much easier to maintain and significantly faster than open-source public blockchains. Many large enterprises and publicly traded companies utilize permissioned ledgers, and examples of this type of blockchain include Quorum, R3, B3i and Hyperledger.