Spoofing methods in hand-based biometrics

fingerprint spoofing, liveness detection technologies, hand spoofing

Biased or damaged biometric samples could be rejected after revealing their poor quality, or may be enhanced, what leads to the situation that samples, which would be normally rejected, are accepted after the enhancement process. But this process could present also a risk, because the poor quality of a sample could be caused not only by the sensor technology or the environment, but also by using an artificial biometric attribute [imitation of a finger(print)]. Such risk is not limited just to the deceptional technique, but if biometric system is not able to recognize whether an acquired biometric sample originates from a genuine living user or an impostor, we would then scan an artificial fake and try to enhance its quality using an enhancement algorithm.