A sensing method for a capacitive touch panel includes charging a measure capacitor, setting the voltage across a mutual capacitor at the intersection of two traces of the capacitive touch panel, and then injecting partial charges of the measure capacitor into the mutual capacitor. The system comprises dilation tool, at least one workinginsertion cannula, a plurality of screws, at least one fixation rod for connecting the screws, and a rod inserter. If the cyphertext response matches a pre-stored cyphertext string associated with the plaintext challenge, then the device is authenticated. The settings for causing every element in the sufficient set to transmit a signal conflict.