The probability that a biometric system will fail to identify an applicant, or verify the legitimate claimed identity of an applicant. (SP 800-76) (NISTIR) The measure of the likelihood that the biometric security system will incorrectly reject an access attempt by an authorized user. A system's false rejection rate typically is stated as the ratio of the number of false rejections divided by the number of identification attempts. (CNSSI-4009) (NISTIR)
Understand more election terms clearly
Get one important election term explained each week, with authoritative sources, practical context and related definitions.
The probability that a biometric system will fail to identify an applicant, or verify the legitimate claimed identity of an applicant. (SP 800-76) (NISTIR) The measure of the likelihood that the biometric security system will incorrectly reject an access attempt by an authorized user. A system's false rejection rate typically is stated as the ratio of the number of false rejections divided by the number of identification attempts. (CNSSI-4009) (NISTIR)
Cite this term
Election Security Glossary. (2026). False Rejection Rate (frr). In Election Security Glossary. Retrieved August 22, 2026, from https://electionsecurityglossary.com/glossary/false-rejection-rate-frr
Sources
01
Single-source
Get the weekly election term
Receive one cited, source-backed election explanation in your inbox each week.