Glossary F
- Fingerprint
- FIPS
- Firewall
- Firmware
- Flooding
- Forensics
- Format
- FDCC
- Fail Safe
- Fail Secure
- Fail Soft
- Fail to Known ...
- Failover
- Fault Injection Testing
- Fault Tolerant
- Fault Tolerance
- Fault Tree Analysis
- Flash ROM
- Framework
- False Accept Rate ...
- False Acceptance
- False Negative
- False Positive
- False Reject Rate ...
- False Rejection
- Federal Acquisition Regulation

Fingerprint
A hash value of a (public) key encoded into a string (e.g., into hexadecimal). Several fingerprint formats are in use by different SSH implementations.See NISTIR ...
Fail Secure
A mode of termination of system functions that prevents loss of secure state when a failure occurs or is detected in the system (but ...
Fail to Known State
Upon a disruption event that causes the system to fail, it fails to a pre-determined state. Failure in a known safe state helps to prevent ...
Fault Injection Testing
Attempting to artificially cause an error with an app during execution by forcing it to experience corrupt data or corrupt internal states to see how ...
Fault Tolerant
Of a system, having the built-in capability to provide continued, correct execution of its assigned function in the presence of a hardware and/or software fault. See NIST ...
Fault Tolerance
Fault Tolerance is the capability of a system to suffer a fault, but continue to operate. In other way, the system can tolerate the fault ...
Fault Tree Analysis
A top-down, deductive failure analysis in which an undesired state of a system (top event) is analyzed using Boolean logic to combine a series of ...
False Accept Rate (FAR)
Proportion of verification transactions with wrongful claims of identity that are incorrectly confirmed. See CNSSI 4009-2015 (ISO/IEC 19795-1:2006) for more information. Defined over an authentication transaction. ...
False Acceptance
When a biometric system incorrectly identifiesa biometric subject or incorrectly authenticates a biometric subject against aclaimed identity.See CNSSI 4009-2015 (DoD BiometricsEnterprise Architecture (Integrated) v2.0) for moreinformation.
False Negative
Incorrectly classifying malicious activity as benign.See NIST SP 800-86 for more information.An instance in which a security tool intended to detect a particular threat fails to ...
False Positive
An erroneous acceptance of the hypothesis that a statistically significant event has been observed. This is also referred to as a type 1 error. When ...
False Reject Rate (FRR)
Proportion of verification transactions with truthful claims of identity that are incorrectly denied. See CNSSI 4009-2015 (ISO/IEC 19795-1:2006) for more information. False Reject Rate (defined over an authentication transaction).See NIST SP ...
False Rejection
The failure of a biometric system to identify a biometric subject or to verify the legitimate claimed identity of a biometric subject. See CNSSI 4009-2015 (NIAP 7298 ) for more ...