The blockchain models are mainly classified under two categories that are permissioned and permissionless. The permissioned blockchain models are closed-type network models in which the authorized entities only participate in block creation. The authorized persons can access and view the transaction information of the blockchain. It accomplishes controlled transparency. The privacy of permissioned blockchain models depends on governance. Unlike the public blockchain, models are open-type networks in which anyone can access and view the decentralized blockchain data. It provides complete transparency of anonymous transactions. It does not require the participation of centralized authorities and intermediaries. Some of the advantages of permissioned blockchain models are as follows.
   •  Incremental Decentralization
   •  Highly Personalized
   •  Strong Privacy
   •  Fast Transactions
   •  High Scalability
  Some of the advantages of permissionless blockchain model are as follows.
   •  Broader Decentralization
   •  Resistance of Censorship
   •  High Transparency
   •  Security Resilience