This has an important consequence.
Authentication is the process by which a claimed identity is verified.
In one system with many individuals performing administrator or security officer tasks, the system established an identifier associated with the role being performed. Ability has something to do with identity. How we can see there are three types of identifications - a statement of identity, collective identity and ability. Authentication is the process by which a claimed identification is verified. A kind of authenticators should be defined as a set of authenticators that can be used in the same type of identification of the same entity.