Spoofing methods in hand-based biometrics

Abstract

We discuss antispoofing and spoofing methods for hand-based biometrics. Generally, the methods which are based on skin properties could be used not only on fingers, but on the whole hand or even body. The most promising antispoofing technology is very probably the multispectral illumination and sensing. This technology acquires real skin reaction to the illumination with a concrete wavelength, which is hard to simulate for a combination of more wavelengths. Another very promising technology is to use the electrical properties of the human finger, i.e., combination of charging and turbulent flow (induction). However, some fakes have been found for this technology as well. Also, some fingerprint acquisition technologies include automatic antispoofing detection - these are for example, ultrasound scanning and optical tomography. These methods penetrate beneath the skin and acquire the underlying structures of the skin. Therefore if there is any fake glued on the fingertip surface, these technologies show artifacts on the image, which means that a finger(print) fake is in use.