Which of the following is an example of the piggybacking method used to gain access to restricted areas?

• A. Pretending to be a member of a large crowd of people authorized to enter a restricted area
• B. Taking advantage of a legitimate computer user's active session when the user attends to other business while still logged on
• C. Following behind an individual who has been cleared for access into a restricted area
• D. All of the above

Answer: (D)

Piggybacking is getting into a restricted area by using someone else’s authorized access rather than presenting your own credentials. Each scenario shows exploiting that trust or momentary lapse rather than bypassing security outright. Following a cleared person through a doorway lets you slip in without swiping, while blending in with a group that has permission relies on social cues to be accepted as part of the flow. Exploiting a legitimate user’s active session means you ride on their authenticated access instead of proving yourself again. Together, these illustrate how piggybacking works in practice, so all the listed methods fit this technique.