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False Acceptance Rate

nounid 2557·updated May 9, 2026
candidate

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.

polysemousMWE

Classifications

Entity Type

Metric95%llm-generatedllm:claude-haiku-4-5

Sensitivity

85%llm-generatedllm:claude-haiku-4-5

Information Class

90%llm-generatedllm:claude-haiku-4-5

Variants

acronym
FAR
plural
False Acceptance Rates
possessive
False Acceptance Rate's
pluralpossessive
False Acceptance Rates'

Framework definitions

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.

Outgoing relationships

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Incoming relationships

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