Which statement best describes whether the verifier is explicitly notified when the supplicant is authenticated?

• A. Explicit notification to the verifier occurs.
• B. No explicit notification to the verifier occurs.
• C. Notification depends on the service.
• D. Kerberos handles notification automatically.

Answer: (B)

In this type of authentication, the verifier doesn’t receive a separate, explicit alert that the supplicant has been authenticated. Instead, the proof of authentication is embedded in the credentials the supplicant presents. For example, in a Kerberos-style flow, the user authenticates to the authentication server and gets a ticket. When the user tries to access a service, they present that ticket to the service, which validates it using its own keys. If the ticket is valid, the service grants access, and that success is evidenced by accepting the valid credential rather than by receiving a direct notification that authentication occurred. So there isn’t an explicit notification signal to the verifier—the verification result is implicit in the valid credential presented.