In a biometric system, what is the result when the False Acceptance Rate (FAR) is lower?

A lower False Acceptance Rate (FAR) in a biometric system indicates that the system is designed to be more stringent in its authentication process. FAR measures the likelihood that the system incorrectly accepts an unauthorized user as a legitimate one. When this rate is lower, it means that the system effectively distinguishes between authorized and unauthorized individuals, resulting in fewer false positives.

As a consequence, when FAR decreases, the overall security of the system improves because it becomes increasingly difficult for unauthorized persons to gain access. This heightened security can be critical in environments where sensitive information or resources must be protected, as it helps ensure that only legitimate users are granted access.

While other factors such as cost, enrollment rates, and processing time may affect the overall design and performance of a biometric system, a lower FAR primarily signifies enhanced security measures and improved accuracy in user identification and authentication.