ISO/IEC 19989-2:2020 情報セキュリティ—生体認証システムのセキュリティ評価の基準と方法論—パート2：生体認証のパフォーマンス | ページ 6

3.1

bona fide presentation

interaction of the biometric capture subject and the biometric data capture subsystem in the fashion intended by the policy of the biometric system

Note 1 to entry: Bona fide is analogous to normal or routine, when referring to a bona fide presentation.

Note 2 to entry: Bona fide presentations can include those in which the user has a low level of training or skill. Bona fide presentations encompass the totality of good-faith presentations to a biometric data capture subsystem.

Note 3 to entry: The concept “in the fashion intended by the policy of the biometric system” for bona fide is included in the concept “in accordance with the policy of the intended use of the biometric system” used in this document

[SOURCE: ISO/IEC 30107-3: 2017, 3.1.2, modified — Note 3 to entry has been added]

3.2

bona fide presentation classification error rate

BPCER

proportion of bona fide presentations incorrectly classified as presentation attacks in a specific scenario

[SOURCE: ISO/IEC 30107-3: 2017, 3.2.2]

3.3

detection error trade-off curve

DET curve

modified ROC curve which plots error rates on both axes (false positives on the x-axis and false negatives on the y-axis)

Note 1 to entry: An example set of DET curves is shown in ISO/IEC 19795-1:2006, Figure 3.

[SOURCE: ISO/IEC 19795-1:2006, 4.7.1]

3.4

false accept rate

FAR

proportion of verification transactions with wrongful claims of identity that are incorrectly confirmed

[SOURCE: ISO/IEC 19795-1:2006, 4.6.6]

3.5

false-negative identification-error rate

FNIR

proportion of identification transactions by users enrolled in the system in which the user’s correct identifier is not among those returned

[SOURCE: ISO/IEC 19795-1:2006, 4.6.8]

3.6

false-positive identification-error rate

FPIR

proportion of identification transactions by users not enrolled in the system, where an identifier is returned

[SOURCE: ISO/IEC 19795-1:2006, 4.6.9]

3.7

false reject rate

FRR

proportion of verification transactions with truthful claims of identity that are incorrectly denied

[SOURCE: ISO/IEC 19795-1:2006, 4.6.5]

3.8

impostor attack presentation match rate

IAPMR

<full-system evaluation of a verification system> proportion of impostor attack presentations using the same PAI species in which the target reference is matched

[SOURCE: ISO/IEC 30107-3: 2017, 3.2.6]

3.9

operating point

setting of a biometric system to operate at a fixed decision threshold

Note 1 to entry: An operating point can be directly represented by a decision threshold or can be represented by a predefined configuration parameter.

3.10

policy of the intended use

policy stating how bona fide presentations are to be made

Note 1 to entry: Intended use is about how natural biometrics should be used with the TOE, i.e. presentations made in the way that bona-fide presentations are made. Presentations made with artefacts are not considered.