Hyperledger Fabric essentially implements a private validator network protocol.

None of the entities in a network must register with membership services to obtain with access and transaction authority on the network.

Selected entities in a network must register with membership services to obtain an identity with access and transaction authority on the network.

All the entities in a network must register with membership services to obtain an identity with access and transaction authority in the network.

Selected entities in a network must register with Reputation Manager to obtain an identity with access and transaction authority on the network.