Modern biometric systems are vulnerable to so-called spoofing attacks, in which an attacker attempts to impersonate a biometric system. Common attacks are presentation attacks, in which biometric characteristics of another person are presented to the system, or morphine attacks, in which the identities of several persons are mixed in order to bypass the biometric recognition system. In this talk, the current attacks will be presented in more detail and the current state of research will be presented and discussed.