When setting up a private or consortium blockchain between well-trusted entities, you might not need a full-blown consensus protocol.
It might be sufficient to work with a permissions-only consensus. This capability describes a consensus method in which there is no PoW to be done to verify transactions. Rather, it is based on the authorization and granted permissions that a user has on the data. If a user has write privileges on a certain entity, then they are allowed to modify that entity's data. Some users might have all permissions on a system, whereas others only have read permissions on a specific type of entity. This consensus model is more in line with permission models used by a traditional database or web application. ...
