(fâls ak-sep´t&ns) (n.) In biometrics, the instance of a security system incorrectly verifying or identifying an unauthorized person. Also referred to as a type II error, a false acceptance 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.
The false acceptance rate, or FAR, is the measure of the likelihood that the biometric security system will incorrectly accept an access attempt by an unauthorized user. A system’s FAR typically is stated as the ratio of the number of false acceptances divided by the number of identification attempts.
Compare to false rejection.
- false positive
(fâls poz´&-tiv) (n.) The condition in which spam-filtering software will incorrectly identify a legitimate, solicited or expected e-mail as a spam transmission. As spammers use more and more sophisticated methods of averting spam filters, the filters have to adapt to keep the onslaught of spam at bay. While sophisticated spam filters, such as the ones […]
- false drop
A search results page that is returned, but not relevant to the search query. This usually happens when the pages returned contain the keyword, but is in the wrong context or the page author has used a form of keyword stuffing on the page.
- false rejection rate (FRR)
(fâls ri-jek´shun) (n.) In biometrics, FRR, or false rejection rate is the instance of a security system failing to verify or identify an authorized person. Also referred to as a type I error, a false rejection does not necessarily indicate a flaw in the biometric system; for example, in a fingerprint-based system, an incorrectly aligned […]
- fat client
In a client/server architecture, a client that performs the bulk of the data processing operations. The data itself is stored on the server. See thin client for contrast. Although the term usually refers to software, it can also apply to a network computer that has relatively strong processing abilities.
- fatal error
An error that causes a program to abort. Sometimes a fatal error returns you to the operating system. When a fatal error occurs, you may lose whatever data the program was currently processing. Contrast with fatal system error, an operating system-specific error.