At first glance, the frustration of typing passwords may seem like a very personal problem, which is not enough to confirm product-market fit or feasibility. Given that this was an academic project, it was appropriate that I conduct some research into the current gesture recognition concepts, biometrics collection technologies, machine learning algorithms, and the social acceptability of biometric technologies.
Few interesting tidbits I discovered through my research:
Our bodies gives off all kinds of unique biometrics, from iris patterns, the rhythm of our typing, to our gait. These biometrics can allow for many ways to identify a human being.
There are two general types of biometrics - physiological and behavioural. Physiological biometrics can be fingerprints, iris patterns, etc., and are usually unchangeable. Behavioural biometrics such as keystroke and gait can change over time. There are different risks with each type. For example, if a fingerprint is stolen, the security is breached permanently and cannot use the same print again. On the other hand, a dynamic biometric may be less secure because the matching process may be less accurate.
Gesture recognition is feasible through camera and other sensor technologies. There are numerous papers dating back to the 1980s confirming these applications. In spite of this, machine learning for gesture recognition in real time is still very bleeding edge. So, seamless authentication may be a challenge.
Gesture recognition with movement sensors such as gyroscope and accelerometers is relatively new, but processing these signals uses the same conventional image recognition and compression methods.
Biometric authentication is a very different subject from biometric identification. Authentication involves additional measures to consider security and privacy risks. Unfortunately, there had been little published research on biometric authentication. Fortunately, it is a trending topic so there should be more insight within the next 5-10 years.
People do not like to make grand gestures that make them look like a clown. There are gestures that are socially acceptable and gestures that are offensive to different cultures. Moreover, there are subtle gestures that may come across as inappropriate in context (e.g. Check your watch too early in a meeting will annoy the presenter, tapping your foot, etc.)