This document describes techniques (300, 600) and apparatuses (102, 106, 700, 800, 900) for peripheral authentication. These techniques (300, 600) and apparatuses (102, 106, 700, 800, 900) may configure data lines for authentication between host device (102) and peripheral (106), use these configured data lines to authenticate the peripheral (106), and then reconfigure the data lines for use. These techniques (300, 600) may also or instead transmit time stamps to a remote entity (402) for tracking peripheral use and/or present home screens (122) responsive to connection to a peripheral (106).