From a security viewpoint, a false acceptance is always worse than a false rejection.

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A false acceptance (allowing an unauthorized person access) and a false rejection (denying an authorized person access) have different impacts depending on the context. In high-security environments, a false acceptance could be considered worse due to the potential for unauthorized access to sensitive information or areas. However, in customer-facing services, a false rejection could be seen as worse due to the negative impact on user experience and potential loss of business. The severity of either depends on the specific security requirements and priorities of the system in question.

From a Security Viewpoint, a False Acceptance Is Always Worse