CBP CBP Biometric Performance Metrics and Testing

Question 1

What does the False Acceptance Rate (FAR) measure in a biometric system?

Accepted Answer

The rate at which imposters are incorrectly accepted

Answer

FAR measures the frequency with which unauthorized individuals are incorrectly accepted by the biometric system.

Question 2

What does the False Rejection Rate (FRR) indicate in biometric performance evaluation?

Accepted Answer

The percentage of legitimate users incorrectly denied access

Answer

FRR is the rate at which genuine users are incorrectly rejected, directly impacting user convenience and system usability.

Question 3

The Equal Error Rate (EER) is the point at which:

Accepted Answer

FAR and FRR are equal

Answer

The EER is the threshold point where the False Acceptance Rate and False Rejection Rate are equal, commonly used to compare system accuracy.

Question 4

Which metric specifically measures a biometric system's ability to correctly identify enrolled users across a database?

Accepted Answer

Identification Rate (Rank-1)

Answer

The Rank-1 Identification Rate measures the probability that the correct identity appears as the top match in a 1-to-many search.

Question 5

What is the Failure to Enroll Rate (FTE) in biometrics?

Accepted Answer

The rate at which individuals cannot be enrolled due to insufficient biometric quality

Answer

FTE represents the proportion of users whose biometric samples do not meet minimum quality standards for enrollment.

(CBP) Certified Biometrics Professional Practice Test