Fake fingerprint detection device, operating method thereof, and fingerprinting authentication system

A fingerprint authentication system comprising:

• a fake fingerprint detection device configured to output a sequence of pulse signals through a transmitting electrode, receive a sequence of pulse responses that have passed through a target object through a receiving electrode, generate a detection metric based on the sequence of pulse responses, and determine whether the target object corresponds to a fake fingerprint based on the detection metric;
• and
• a fingerprint sensor configured to, in response to the target object being determined to correspond to a live fingerprint, capture a fingerprint image of the target object, extract minutiae from the fingerprint image, compare the extracted minutiae with pre-registered user minutiae, and perform user authentication based on the comparison.