Piggybacking: One of the fraudulent authentication-based access methods where a person without permission to access a restricted zone intentionally enters said zone together with a person who has access permissions. Also called 'piggybacking' or 'piggyback,' this is one of the most typical methods of gaining unauthorized access along with a
tailgating. Generally, piggybacking refers to the act of gaining unauthorized access with intent, while tailgating refers to the act of gaining unauthorized access without intent.