STARTEK FM220U - 11.Q and A; What are FAR (False Acceptance Rate) and FRR (False Rejection Rate)?; Security Level

FM220 User Guide Doc. FM220_Win_1.0
11.Q and A
What are FAR (False Acceptance Rate) and FRR (False Rejection Rate)?
FAR (False Acceptance Rate): Rate that a biometrics system falsely identifies
different features as identical. FAR represents security level. FRR (False
Rejection Rate): Rate that identical features are identified as different. FRR
represents convenient level.
STARTEK FAR: 1/100,000~1/1,000,000 STARTEK FRR: 1/30~1/100
Security Level:
Security level is set by the threshold matching scores. When setting security
level high, i.e. setting threshold scores high, FAR reduces while FRR rises. In
referring to the following diagram, the cross area among X-axis, Curve B and
threshold line (Area B) stands for FAR, and the cross area among X-axis,
Curve A and the threshold line (Area A) stands for FRR. Then when the
threshold line moves toward right, i.e. raise the security level, Area B shrinks
while Area A expands. Security level will vary for different applications. The
picture next to "Security Level & FAR & FRR" shows different security level
demand for market segments and STARTEK's FAR vs. FRR curve.
Secure Level
Score Threshold
FAR
A
2,500
1/200,000
B
2,000
1/100,000
C
1,500
1/50,000
D
1,000
1/10,000
E
500
1/2,000
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