False Rejection Rate (FRR)
- The number of times biometric authentication has falsely rejected a legitimate user
- Also known as false negative
- Also known as a Type I Error
False Acceptance Rate (FAR)
- The number of times biometric authentication has falsely authenticated someone when in fact the authentication should have failed
- Also known as false positive
- Also known as a Type II Error
Crossover Error Rate (CER)
- Is the point at which the FRR and FAR meet and is used to determine the quality of the biometric authentication
- Also known as the Equal Error Rate (EER)
- Biometric that output a lower CER are deemed to be more accurate than those that have an higher CER
