What is the name of the stored sample of a biometric characteristic?

The stored sample of a biometric characteristic is referred to as a "template." In biometric systems, when a user first registers their biometric data, such as a fingerprint, facial recognition, or iris scan, that data is processed and converted into a digital format known as a template. This template is then stored in a database and is used later when the biometric system attempts to verify or authenticate the user's identity.

Creating and utilizing a template is essential because it represents the unique traits of an individual's biometric characteristic in a way that can be compared against subsequent samples taken during an access attempt. It ensures that the system can accurately identify or verify individuals based on their biometric characteristics.

The other terms, although related to biometrics, do not accurately describe the stored sample itself. "Profile" is a broader term that may refer to the overall identity information associated with a user, while "reference template" might imply a specific type of template used within a confirmation process. "Biometric signature" is not a standard term used in the context of storage but may refer to the outcome of a biometric verification process. Thus, the use of "template" as the correct term for the stored sample clearly highlights its role in biometric systems.