For biometric authentication, other anti-spoofing techniques:
The eye blink detection method, measuring intrinsic facial movement. After all, a photo can not blink. However, a video of the person blinking would also work. These systems are inconvenient for users, they take a long time in lifeness detection. A similar technique seeks dilatation of the pupil, causing the screen to darken and then suddenly flash. This can detect fakes successfully.
More sophisticated techniques use 3D cameras. But, both require special equipment and, therefore, are not compatible with most websites and mobile cameras available today.