What technology is used to scan users' unique physical features to verify their identity?

Biometric scanners are devices that capture and analyze unique physical characteristics of individuals to authenticate their identity. This technology relies on features such as fingerprints, facial recognition, iris scans, or voice patterns, making it highly personal and difficult to forge. Biometric systems can enhance security by ensuring that only authorized users have access to specific information or areas, as each person's biometric data is unique.

In contrast, a barcode reader interprets printed barcodes, which are not tied to a specific individual but rather to a product or item. Smart card readers work by reading information stored on a chip embedded in a smart card, often requiring a PIN or password for access, making it less secure than biometrics alone. Digitizers are used for converting physical documents or images into a digital format, and they do not perform identity verification. Thus, the technology that specifically scans and processes physical features for identity verification is indeed the biometric scanner.