Error producido cuando el sistema diagnostica como
ataque una actividad normal. [CCN-STIC-432:2006]
Error de un sistema de autenticación biométrico que
deniega el acceso a un individuo legítimamente autorizado. Su probabilidad de
ocurrencia (probabilidad de falso rechazo) 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 falso rechazo, mayor es la probabilidad de
falsa aceptación.
[Ribagorda:1997]
In biometrics, the instance
of a security system incorrectly verifying or identifying an unauthorized
person. It typically is considered the most serious of biometric security
errors as it gives unauthorized users access to systems that expressly are
trying to keep them out. [CNSSI_4009:2010]
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_4009:2010]
An instance in which an
intrusion detection and prevention technology incorrectly identifies benign
activity as being malicious. [NIST-SP800-94:2007]
An instance in which a
security tool incorrectly classifies benign content as malicious. [NIST-SP800-83:2005]
This occurs when the system
classifies an action as anomalous (a possible intrusion) when it is a
legitimate action.
http://www.csoonline.com/glossary/
False Rejects are when an
authentication system fails to recognize a valid user.
http://www.sans.org/security-resources/glossary-of-terms/