Biometric authentication is increasingly seen incorporated into security applications. With that, significant attention is focused on both the quality and accuracy of biometric technology. To promote public acceptance and support, along with minimizing security breaches and misidentification, many biometric systems now incorporate an additional layer of security. Liveness detection.

Biometrics makes use of biological identifiers unique to each of us, intending to verify identity. As an inherence-based authentication, this is the next logical step to knowledge-based and possession-based.

That said, biometric authentication can be vulnerable to spoofing attacks in an attempt to overcome an identification or biometric verification process. The type of attack will be based upon the biometric modality, whether the biometric method involves the iris, face, voice, fingerprints, or keystroke biometrics.