What is considered the most important type of error to avoid for a biometric access control system?

The correct answer is B. Type II Error. When a biometric system is used for access control, the most important error is the false accept or false acceptance rate, or Type II error, where the system would accept an impostor. A Type I error is known as the false reject or false rejection rate and is not as important in t

Submitted by jordan8· Apr 18, 2026Access Controls

Question

Options

AType I Error
BType II Error
CCombined Error Rate
DCrossover Error Rate

How the community answered

(31 responses)

A
6% (2)
B
90% (28)
C
3% (1)

Explanation

When a biometric system is used for access control, the most important error is the false accept or false acceptance rate, or Type II error, where the system would accept an impostor. A Type I error is known as the false reject or false rejection rate and is not as important in the security context as a type II error rate. A type one is when a valid company employee is rejected by the system and he cannot get access even thou it is a valid user. The Crossover Error Rate (CER) is the point at which the false rejection rate equals the false acceptance rate if your would create a graph of Type I and Type II errors. The lower the CER the better the device would be. The Combined Error Rate is a distracter and does not exist.

Topics

#Biometrics#Access Control Errors#False Acceptance Rate (FAR)#Security Risks

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