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10.4.1 Use of multiple samples with fixed thresholds

NIST PIV and digital identity SP 800-76-2 against SP 800-76-1
All changes in this version
added 10 Minimum accuracy specifications part of 10.4

Title changed

Before · SP 800-76-1

After · SP 800-76-2

Use of multiple samples with fixed thresholds

Control changed

Before · SP 800-76-1

After · SP 800-76-2

The thresholds are set to target particular false match rates between single fingers, irises or faces of different individuals. However, if agency policy is to allow two fingers or eyes to be used in an authentication attempt, then false acceptance rates will typically be twice the calibrated value. However, if a system is configured to always or conditionally require multiple instances (e.g., two fingers or two eyes), then a threshold can be adopted (using different decision or fusion logic) to target a lower false accept rate. Similarly if multiple captures (e.g., of face) are allowed, false acceptance is also increased.