An unauthorized individual enters a building following an employee through the employee entrance after the lunch rush. What type of breach has the individual just performed?

Reverse Social Engineering involves an attacker creating a situation where the victim seeks them out for help, rather than the attacker initiating direct contact.

Tailgating (also known as piggybacking) is a social engineering technique where an unauthorized person gains access to a restricted area by closely following an authorized individual through an access control point without presenting their own credentials.

Piggybacking is often used interchangeably with tailgating, but tailgating more specifically refers to following without explicit or tricked consent, making it a more precise term for the described scenario.

'Announced' is not a recognized type of security breach or social engineering technique.