A company is hardening the physical entry to its on-premises server room to stop piggybacking and tailgating. The proposed solution is a small vestibule with two interlocking, automatically locking doors. An employee badges through the outer door. After the door closes and relocks, a weight sensor confirms only one person is present, and a fingerprint reader is used. After successful authentication, the inner door unlocks. Which physical access control BEST matches this design?
The described vestibule is a mantrap. A mantrap is an access-control space with two interlocking doors: the first door must close and lock before the second door can open. Credentials (often two different factors such as a badge and a biometric) are verified while the individual is isolated inside the enclosure, so only one authenticated person can proceed, effectively preventing tailgating and piggybacking.
Full-height turnstiles, security revolving doors, and Faraday cages each serve other security purposes but do not rely on the sequential, two-door interlock that characterizes a mantrap.
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What is piggybacking and tailgating in physical security?
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How does a mantrap prevent unauthorized access effectively?
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What are the other uses of full-height turnstiles and Faraday cages in security?