A company is implementing a biometric authentication system for physical access to a data center. The system must minimize false acceptances. Which metric is most directly related to false acceptance rate (FAR)?
Trap 1: Crossover error rate (CER)
CER is where FAR equals FRR, not a direct measure of FAR.
Trap 2: Equal error rate (EER)
EER is another name for CER.
Trap 3: False rejection rate (FRR)
FRR is the opposite error; lowering FAR usually increases FRR.
- A
Crossover error rate (CER)
Why wrong: CER is where FAR equals FRR, not a direct measure of FAR.
- B
Equal error rate (EER)
Why wrong: EER is another name for CER.
- C
False rejection rate (FRR)
Why wrong: FRR is the opposite error; lowering FAR usually increases FRR.
- D
Threshold setting
The threshold determines how closely a biometric sample must match the stored template; a stricter threshold lowers FAR.