Answer :
Final answer:
The unattended SCIF entry requires an access control system that uses a physical form of authentication, like an access card, and something known only to the user, such as a PIN or password. Biometrics may also be used but are not explicitly required in combination with an access card per the question's context.
Explanation:
The access control system for unattended SCIF (Sensitive Compartmented Information Facility) entry must use methods that ensure secure access by authorized individuals. These methods typically involve multiple forms of authentication to verify the identity of a person trying to gain entry. Based on the multiple-choice options provided in the question, it is likely that the access control system must use something tangible, such as an access card that the individual possesses, combined with something intangible and secret, like a personal identification number (PIN) or a password. Biometrics can also be used, but the question emphasizes a combination of an item one possesses (like a keycard, RFID card, or proximity card) and a piece of knowledge (like a PIN or a password).
While a biometric input such as a fingerprint or retinal scan provides a high level of security, in this scenario, it's not specifically listed as a requirement in combination with an access card. Therefore, based on the given options, the most appropriate answer for the access control system in the question would be a physical access card and a PIN or password combination that ensures both possession and knowledge are verified for secure entry into the SCIF.
