Fingerprint. Voice. Face. Today’s smartphones already include a wide variety of biometrics features that allow you to unlock your phone, access apps and even authorize payments. Now, researchers have come up with a new identity authentication system – using lip reading.
This article is a good opportunity to remind readers about the main pitfalls of this authentication method: Accuracy and the capability to recover from "compromised credentials". On the accuracy side, biometrics still have some challenges. First, they have to cope with changes in our body, such as when we are ill, injured – or simply getting older. Biometrics will never give you the definitive “yes” or “no” a password can, you have to finely tune it so that you have low false positive and low false negative. This is what we call FAR (False Acceptance Rate) and FRR (False Rejection Rate). When looking for a new kind of biometrics, always look for those data.
Biometrics also faces another significant obstacle: you can’t reset them if they’re compromised. You can't change your fingerprints, same for your retina or your voice. Maybe new ideas, such as lip reading, will allow the industry to overcome this issue?