Scenario EvaluationOne of the three types of performance evaluations. The primary goal of a scenario evaluation is to measure performance of a biometric system operating in…
SegmentationA process by which path control divides basic information units into smaller units, called BIU segments, to accommodate smaller buffer sizes in adjacent…
sensorA device that responds to a stimulus, such as heat, light, or pressure, and generates a signal that can be measured or interpreted.
Sensor AgingThe gradual degradation in performance of a sensor over time.
Signature DynamicsA behavioral biometric modality that analyzes dynamic characteristics of an individual's signature, such as shape of signature, speed of signing, pen…
Similarity ScoreA value returned by a biometric algorithm that indicates the degree of similarity or correlation between a biometric sample and a reference.
SkimmingThe act of obtaining data from an unknowing end user who is not willingly submitting the sample at that time.
Slap FingerprintFingerprints taken by simultaneously pressing the four fingers of one hand onto a scanner or a fingerprint card, as illustrated below.
Speaker RecognitionA biometric modality that uses an individual�s speech, a feature influenced by both the physical structure of an individual's vocal tract and…
Speaker Recognition EvaluationsAn ongoing series of evaluations of speaker recognition systems. For more information, visit www.nist.gov/speech/tests/spk/index.htm.
Speech RecognitionA technology that enables a machine to recognize spoken words. Speech recognition is not a biometric technology.
SpoofingSome market analysts maintain that the increased volatility in stock markets may be the result of an illegal practice known as spoofing, or phantom bids.
Submissionany single delivery of evidence in a specific investigation.