Wiktionary
biometrically
adv. In a biometric way; through use of biometrics.
Usage examples of "biometrically".
It can’t recognize your face, but it can tell whether or not a vaguely human-shaped form is sitting in front of it, and if that vaguely human-shaped form goes away, even for a fraction of a second, it will drop into a screen-saver that will blank the display and freeze the machine until such time as you type in a password, or biometrically verify your identity through voice recognition.
The only way for them to get the information is to get Randy to decrypt it for them, which he can do by biometrically identifying himself to his laptop (by talking to it) or by typing in a pass-phrase that only he knows.