Which form of biometric authentication is considered non-intrusive and simple for employees to use?

Fingerprint recognition is considered non-intrusive and simple for employees to use because it typically involves a quick scan of a person's fingerprint, allowing for rapid identification. This form of biometric authentication is user-friendly and often requires minimal training or adjustment for employees, making it an efficient option for workplaces. The technology is well-established and widely accepted, which helps in integrating it into various security systems without significant disruption.

In contrast, other methods like retina and iris scanning may require more specialized equipment and can be perceived as more invasive or cumbersome, as they often involve closer examination and alignment with the scanning apparatus. Facial recognition, while also relatively simple, may still face challenges related to varying lighting conditions and angles, making fingerprint recognition a more practical choice in many scenarios.