Motorola’s head of advanced technology and projects group showcased prototypes at D11 technology conference. The two concepts are meant as alternatives to using passwords, passcodes, picture passwords, and two-factor authentication as a means to access your smartphone, tablet, car, and even your front door. The first project was a simple electronic tattoo manufactured by Cambridge, Massachusetts-based company MC10. The second project features a small chip with one switch that uses your stomach acids to activate creating an 18-bit ECG-like signal inside your body.”]