False Acceptance Rate

nouncandidate·updated May 9, 2026

GlossaryL1 — what DictionaryL2 — how used ThesaurusL3 — relations Universaleverything

The measure of the likelihood that the biometric security system will incorrectly accept an access attempt by an unauthorized user. A system’s false acceptance rate typically is stated as the ratio of the number of false acceptances divided by the number of identification attempts.

Framework senses

4 senses across 3 frameworks

NISTIR 7298: Glossary of Key Information Security Terms, Revision 22 sensesview framework →

§1: The probability that a biometric system will incorrectly identify an individual or will fail to reject an impostor. The rate given normally assumes passive impostor attempts.
§2 · sense_2_pending_review: The measure of the likelihood that the biometric security system will incorrectly accept an access attempt by an unauthorized user. A system’s false acceptance rate typically is stated as the ratio of the number of false acceptances divided by the number of identification attempts.

CNSSI-4009 (Glossary of Information Assurance Terms)1 senseview framework →

§1: The measure of the likelihood that the biometric security system will incorrectly accept an access attempt by an unauthorized user. A system’s false acceptance rate typically is stated as the ratio of the number of false acceptances divided by the number of identification attempts.

NIST SP 800-761 senseview framework →

§1: The probability that a biometric system will incorrectly identify an individual or will fail to reject an impostor. The rate given normally assumes passive impostor attempts.