Division 1.3.2 Measurement of FNIR (False Negative Identification Rate)

The figure in point 1.3.1 applies to the description that follows.

The measurement process shall apply the following logic where the first two steps are always the same as they belong to the identity verification process that is part of the EES:

1. 1..

   A person subject to registration in the EES submits a sample of one or both of the two biometric modalities.

2. 2..

   The biometric verification is conducted with the biometric reference data corresponding with the identity of the person (step 1 of the figure called ‘default verification’).

3. 3..

   For a continuous sample set, a second biometric modality is obtained either from the same person in the case both biometric modalities were submitted in step 1 or from another person for whom steps 1 and 2 of this process were triggered). The combined biometrics are used to run an identification on the complete gallery size including the biometrics of the person(s) to whom the biometric sample belongs. This identification process is expected to yield the known result as the matching biometric sample is included in the comparison.

4. 4..

   In the event the modality used in step 2 corresponds to the fingerprint, an identification (to evaluate the fingerprint identification accuracy) is carried out under the same conditions mentioned in paragraph 3.

5. 5..

   In the case where the biometric identification does not return the expected biometric sample (indicated as ‘match above threshold’) in the hit list, this is a known false negative identification.

Steps 1 and 2 belong to the identity verification process that is part of the EES. Steps 3 and 4 do not belong to the identity verification process and are done for measuring the biometric accuracy performance.

The FNIR (False Negative Identification Rate) is computed as: