Finger vibration biometric could allow authentication on any solid surface

Security system identifies users by finger vibrations — Futurity — “A new low-cost security system called VibWrite could eventually use finger vibrations to verify users… It includes an inexpensive vibration motor and receiver, and can turn any solid surface into an authentication surface… During two trials, VibWrite verified legitimate users with more than 95% accuracy and the false positive rate was less than 3%.”