- False Positive A system mistakenly flags benign or normal activity as suspicious or malicious. While this doesn't pose a direct threat, a high number of false positives can lead to alert fatigue, which is when genuine alerts are ignored due to a large number of false alarms, potentially leading to overlooked real threats.
- False Rejection Rate (FRR) Also known as Type I error rate, FRR measures the likelihood that a biometric security system will incorrectly reject an access attempt by an authorized user. It's one of the two primary metrics used to evaluate the accuracy of biometric systems, the other being the False Acceptance Rate (FAR). A lower FRR means that legitimate users are less likely to be inconvenienced by being denied access. However, reducing FRR typically increases FAR, so system designers must balance security with usability.
- Faraday Cage An enclosure used to block electromagnetic fields. It is typically formed by a conductive material or a mesh of such material. Named after the English scientist Michael Faraday, who invented them in 1836, Faraday cages work by distributing charge or radiation around the cage's exterior, thus canceling out electric charges or radiation fields inside the enclosure. Faraday cages are used to protect electronic equipment from lightning strikes and electromagnetic interference (EMI) as well as to prevent EMI from emanating from electronic devices. They are also used in secure environments to prevent eavesdropping or data theft via electronic means.
- Fault Injection The deliberate introduction of faults or errors into a system to test its resilience and to validate its error detection and recovery capabilities. It can simulate various failure conditions and helps in understanding how a system behaves under abnormal conditions.
- Fault-Resistant Network A fault-resistant network, often synonymous with fault-tolerant networking, incorporates design principles and technologies aimed at achieving continuous network operations despite failures of individual components. Such networks utilize redundancy, diverse routing paths, and self-healing mechanisms to prevent single points of failure and ensure service availability.
- Fault Tolerance The ability of a system to continue functioning properly in the event of a hardware or software failure. This is achieved through the incorporation of redundancy in the system's components or through techniques like replication of tasks so that in the event of a component failure, the system's operation continues without disruption.
- Fault tree analysis A method used to systematically analyze the causes of a failure or undesirable event in a system. Using a tree-like diagram, it represents the relationships between the system's components, highlighting potential problems or threats that could lead to a failure.
- FCoE (Fiber Channel over Ethernet)A protocol that allows Fiber Channel communications to run directly over high-speed Ethernet networks, combining the robust and established world of Fiber Channel with the versatility and ubiquity of Ethernet. This provides a unified fabric that carries both storage and network traffic, thus simplifying data center infrastructure and reducing costs.
- Feasibility Study A critical analysis and evaluation of a proposed project or system to determine if it is technically feasible, if it is feasible within the estimated cost, and if it will be profitable or not. This process typically involves evaluating different solutions and recommending the most effective option based on factors such as cost efficiency, technical capabilities, and regulatory compliance.
- Federal Information Processing Standards (FIPS)Publicly announced standards developed by the United States federal government for use in computer systems by non-military government agencies and government contractors. FIPS standards are issued to establish requirements for various purposes, such as ensuring computer security and interoperability, and are intended to be adhered to both by the agencies themselves and any companies doing business with them. Among the well-known FIPS standards is FIPS 140, which specifies the security requirements for cryptographic modules used within a security system protecting sensitive but unclassified information.
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