What device did Grayson utilize to retrieve evidence by authenticating with user information?

Grayson utilized a biometric scanner to retrieve evidence by authenticating with user information. Biometric scanners are devices that analyze unique physical characteristics of an individual, such as fingerprints, facial recognition, or iris patterns, to verify identity. This method of authentication is particularly valuable in digital forensics, as it provides a secure and reliable means to access user data while ensuring that only authorized individuals can retrieve sensitive information.

In the context of forensic investigations, using a biometric scanner allows for a more direct and secure form of identification compared to other methods. This ensures the integrity of the evidence and helps maintain a solid chain of custody, which is crucial in legal proceedings. Other devices listed, while they may serve various security purposes, do not specifically offer the same level of personal authentication through unique biological traits that a biometric scanner provides.