What is called the percentage of valid subjects that are falsely rejected by a Biometric Authentication system?

The correct answer is A. False Rejection Rate (FRR) or Type I Error. Biometric systems make two types of errors. False Rejection Rate (FRR), also called Type I Error, is the percentage of legitimate, enrolled users who are incorrectly denied access - the system fails to recognize a valid person. False Acceptance Rate (FAR), also called Type II…

Submitted by amina.ke· Apr 18, 2026Access Controls

Question

What is called the percentage of valid subjects that are falsely rejected by a Biometric Authentication system?

Options

AFalse Rejection Rate (FRR) or Type I Error
BFalse Acceptance Rate (FAR) or Type II Error
CCrossover Error Rate (CER)
DTrue Rejection Rate (TRR) or Type III Error

How the community answered

(41 responses)

A
93% (38)
C
5% (2)
D
2% (1)

Explanation

Biometric systems make two types of errors. False Rejection Rate (FRR), also called Type I Error, is the percentage of legitimate, enrolled users who are incorrectly denied access - the system fails to recognize a valid person. False Acceptance Rate (FAR), also called Type II Error, is the opposite: illegitimate users who are incorrectly granted access. The Crossover Error Rate (CER), also called Equal Error Rate (EER), is the point at which FRR equals FAR and is used to compare the overall accuracy of biometric systems - a lower CER indicates a more accurate system. 'True Rejection Rate' and 'Type III Error' are not standard biometric terms.

Topics

#Biometrics#Authentication errors#FRR#Type I Error

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