Biometric Systems

Question 1

False Acceptance Rate (FAR)

Answer 1

Represents the proportion of times a system incorrectly grants access to an unauthorized person.
In statistical terms, FAR corresponds to a Type II error.

Question 2

False Rejection Rate (FRR)

Answer 2

Indicates the percentage of valid users who are incorrectly rejected by the system.
In statistical terms, FAR corresponds to a Type I error.

Question 3

Crossover Error Rate (CER)

Answer 3

Describes the point where FRR and FAR are equal.
Also referred to as the Equal Error Rate (EER).
At this threshold, the system balances false acceptances and false rejections