A large corporation uses the following methods of multifactor authentication to access secure areas: - Electronic key badges - Facial recognition - Passphrase An employee who was on extended medical…

Facial recognition is a biometric factor that maps distinct facial geometry to a stored template for verification. Significant physical changes such as weight loss can alter facial structure enough that the live scan no longer matches the enrolled template, causing authentication failure even though the employee's other credentials such as the key badge remain valid.

The employee successfully retained access to the building, which requires the key badge, so the badge was valid and functioning correctly.

Passphrases do not fail because they are too long; they fail only when the incorrect passphrase is entered, and a passphrase configured at a given length continues to work at that length.

The employee retained building access upon return, which indicates time-based or hours-based restrictions were not the cause of the denial to the specific secure area.