Die False Acceptance Rate (FAR) ist eine entscheidende Kennzahl in biometrischen systems and security protocols that assesses the accuracy of authentication methods. It represents the probability that an unauthorized user is falsely identified as an authorized user by the system. This metric is particularly significant in applications such as Gesichtserkennung, fingerprint scanning, and other biometric identification techniques.
FAR is calculated by taking the number of false acceptances (instances where the system incorrectly grants access to an unauthorized user) and dividing it by the total number of identification attempts made bewertet.
FAR = (Anzahl der falschen Akzeptanzen) / (Gesamtzahl der unbefugten Versuche)
Eine niedrigere FAR weist auf ein sichereres System hin, da sie die Chancen unbefugten Zugriffs minimiert. Im Gegensatz dazu deutet eine hohe FAR auf Schwachstellen im Authentifizierungsprozess hin, was zu Sicherheitsverletzungen und unbefugtem Zugriff auf sensible Informationen führen kann.
It is important to balance FAR with the False Rejection Rate (FRR), which measures the likelihood that an authorized user is incorrectly denied access. A system with low FAR but high FRR may unbefugten Zugriff verhindern but also frustrate legitimate users. Therefore, when designing biometric systems, achieving an optimal balance between FAR and FRR is essential for usability and security.