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What is this known as when Jamie enters the corporate headquarters of his firm, he must pass through a tiny space with two closed doors; after entering through the first door, it will lock behind Jamie, and he will need to produce identification to access via the second door?

A a mantrap

A mantrap is a type of trap intended to prevent infiltration techniques like tailgating and piggybacking. A mantrap is a tiny enclosed space with two lockable doors that separate the outside world from a safe location. A person will enter via the first door, but that door must be closed behind them before the second door may be opened.