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Access Control Vestibule (Mantrap)

An access control vestibule is a secured entryway with two sequential doors that traps unauthorized individuals between them, preventing access to restricted areas. Formerly called a man trap, it functions as both a physical access control measure and a strong deterrent against unauthorized entry.

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About this video

An access control vestibule is a physical security feature that places a contained, secured space between two areas — one generally accessible and one restricted. To enter the protected area, an individual must pass through two sequential security doors, with the intermediate space serving as a checkpoint. Anyone who cannot verify their authorization at the second door is held in that space, unable to move forward or retreat until the situation is resolved by security personnel. Beyond its mechanical function, the access control vestibule is a significant psychological deterrent. Unlike a single door, which an unauthorized person can simply walk away from after a failed attempt, the vestibule raises the stakes considerably — a failed entry means being physically confined. This reality discourages most unauthorized attempts from occurring at all, making the vestibule as valuable for its deterrent effect as for its containment capability. The term "man trap" was historically used to describe this configuration, but "access control vestibule" is now the accepted industry-standard terminology.

What you'll learn

What's covered

Access Control Vestibule

Key terms

Access Control
A security mechanism that restricts access to resources based on policies, roles, or identity.
Authentication
The process of verifying the identity of a user, device, or system.
Access Control Vestibule
A physical security entry point consisting of two interlocked doors — the first must close and lock before the second can open — ensuring only one person passes through at a time and preventing unauthorized tailgating into a secure facility.

Topics

Access Control Vestibule Physical Security Access Control Security Deterrence Physical Access Control

Transcript

Access Control Vestibules

Some businesses and buildings will have an access control vestibule, kind of a trap in between two areas where you have to walk through in order to gain access to a secure area.

This is what AI generated for us as an access control vestibule. Essentially what you would do is you would walk into this middle section right here, and you would have to go through these two security doors right there. What happens is, if you are not authorized to be in that area, then you get trapped in between. Sometimes this is called a man trap — that was the older term for this. Now we call this an access control vestibule.

The idea behind this is that you are now stuck. Not only is this a way to control the access, but it's also a deterrent. No one wants to get stuck in this area right here, so it's less likely that somebody's even going to attempt it. Whereas if they just go through one door, then if they don't attempt it, they just walk off and it's not a big deal. But in this case right here, they get trapped in here. So it's much bigger of a deal and much more of a deterrent.

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