A persons 'capacitive footprint' depends on skin moisture, clothing, anatomy, etc. This allows Touché to distinguish certain users from each other in a lab sett

A persons 'capacitive footprint' depends on skin moisture, clothing, anatomy, etc. This allows Touché to distinguish certain users from each other in a lab setting. As this approach uses only a single electrode (which is why it is so cool), the data it offers is quite limited compared to more complex sensor layouts. In real life, such a sensor would need to work reliably even if I wear different shoes, have dirty hands, etc. Therefore, its false rejection rate needs to be very low. Which leads to a high false acceptance rate, i.e. several other people with similar capacitive footprints may open my door, too.