Error producido cuando el sistema diagnostica como
actividad normal un ataque. [CCN-STIC-432:2006]
Error de un sistema de autenticación biométrico que
autoriza el acceso a un impostor. Su probabilidad de ocurrencia (probabilidad
de falsa aceptación) es una de sus características significativas.
Habitualmente, estos sistemas pueden ajustarse para
variar esta probabilidad dentro de un amplio margen. Desgraciadamente, cuanto
más pequeña sea la probabilidad de falsa aceptación, mayor es la probabilidad
de falso rechazo.
[Ribagorda:1997]
In biometrics, the instance
of a security system failing to verify or identify an authorized person. It
does not necessarily indicate a flaw in the biometric system; for example, in a
fingerprint-based system, an incorrectly aligned finger on the scanner or dirt
on the scanner can result in the scanner misreading the fingerprint, causing a
false rejection of the authorized user. [CNSSI_4009:2010]
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_4009:2010]
An instance in which an
intrusion detection and prevention technology fails to identify malicious
activity as being such. [NIST-SP800-94:2007]
An instance in which a
security tool intended to detect a particular threat fails to do so. [NIST-SP800-83:2005]