A system (100) and method (200) for preventing unauthorized use of a device (114). The system (100) includes a biometric reader (110) and an authentication unit (112). The biometric reader (110) measures a biometric characteristic and transmits the measured biometric characteristic to the authentication unit (112) over a communications link (118). The device (114) is embedded within a garment (116), and the authentication unit (112) transmits an authorizing signal to the device (114) when the authentication unit (112) biometrically identifies a user. In one arrangement, the authentication unit (112) can include a database (134) for storing authorized biometric samples. The authentication unit (112) can compare the measured biometric characteristic with the authorized biometric samples when the authentication unit (112) receives the measured biometric characteristic from the biometric reader (110).