A system includes a wearable device having at least one sensor configured to determine a user's fingerprint data, at least one data storage device containing authentication data, and at least one processor configured to compare the user's fingerprint data with the authentication data to authenticate a user. A method of authenticating a wearable device includes producing a fingerprint, determining fingerprint data derived from the fingerprint with one or more sensors, comparing the fingerprint data with authentication data on one or more data storage devices, and authenticating the user if the fingerprint data and the authentication data match.