An organization wants to let traveling executives access a restricted voicemail box by calling in from any phone. The solution must rely on a biometric factor without requiring specialized hardware on the handset or forcing the user to remember additional credentials. Which physical access security control best meets these requirements?
Voiceprint recognition compares the unique pitch, tone, and cadence patterns in a person's speech against a stored template. Because every telephone already has a microphone, no extra scanning hardware is needed, and the executive does not have to recall additional secrets. Fingerprint, retina, and facial recognition all require specialized readers or cameras that are not available on an ordinary voice-only phone, so they would not meet the stated constraints.
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What is voiceprint recognition?
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How does voiceprint recognition work without specialized hardware?
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Why are other biometric methods like fingerprints or retina scans not suitable for this scenario?