Tailgating, sometimes referred to as piggybacking, is a physical security breach in which an unauthorized person follows an authorized individual to enter a secured premise.
In security, piggybacking, similar to tailing, refers to the time when a person accompanied by another authorized person enters a restricted area or passes through a certain checkpoint. It can be electronic or physical. The action may be legal or illegal, authorized or not, depending on the case. However, the term often carries the connotation of an illegal or unauthorized act.
To describe the act of an unauthorized person following someone into a restricted area without the consent of an authorized person, the term regulation is also used. "Following" does not imply any consent, while "piggybacking" generally implies the consent of the authorized person.
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