In biometric systems, what does a higher false rejection rate indicate?

A higher false rejection rate in biometric systems indicates that legitimate users are being incorrectly denied access. This means that the system has a stringent threshold for verifying individuals, leading to more instances where people who should be granted access are rejected.

In biometric authentication, the false rejection rate is a measure of the system's reliability in accurately recognizing authorized users. When this rate is high, it reflects an increased number of instances where users have to attempt multiple times to gain access, which can create frustration and inefficiency. This is why a higher false rejection rate correlates with more denied access; legitimate users are not able to access the system as frequently as they should.

Improved security would typically be characterized by a lower false rejection rate, which means that more legitimate users can access the system without hindrance. Higher user acceptance tends to be associated with systems that balance security and accessibility effectively, which would mean lower false rejection rates. Lastly, a lower risk of phishing is more related to the security mechanisms of the system rather than the incidences of falsely rejecting legitimate users.