1. A system comprising: one or more capacitive touch sensors; at least one hardware processor; and at least one computer-readable storage medium having computer-executable instructions that, when executed by the at least one hardware processor, cause the at least one hardware processor to: obtain, from one or more capacitive touch sensors, a first touch contact duration of a first touch contact and a second touch contact duration of a second touch contact received when a user performs a current instance of a gesture, the first touch contact being performed at least partly concurrently with the second touch contact; obtain, from the one or more capacitive touch sensors, a first touch contact pressure of the first touch contact and a second touch contact pressure of the second touch contact; obtain stored touch contact durations and stored touch contact pressures from a previous instance when the gesture was performed; perform touch contact duration comparisons of the first touch contact duration of the first touch contact and the second touch contact duration of the second touch contact to the stored touch contact durations from the previous instance when the gesture was performed; perform touch contact pressure comparisons of the first touch contact pressure of the first touch contact and the second touch contact pressure of the second touch contact to the stored touch contact pressures from the previous instance when the gesture was performed; and perform an action in response to the current instance of the gesture, provided the touch contact duration comparisons and the touch contact pressure comparisons indicate the same user performed the current instance of the gesture and the previous instance of the gesture.