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 systems 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/
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