The services within a domain service inventory provide access to confidential data retrieved from a shared database. These services need to be accessible from outside the domain service inventory. Which of the following design options will preserve the confidentiality of the data when the services are accessed from outside the service inventory?

A hashing function always returns _____________ for the same input data.

The application of the Brokered Authentication pattern is best suited for a scenario whereby a service consumer does not need to re-authenticate itself with multiple services.