Coding to facilitate connection between arduino UNO & a USB port which will be installed on the board. I am working on a project where the arduino will generate one time passcodes that can be verified by using google authenticator. Google also offers a physical USB security key which saves the same algorithm that generates the OTP's. (Example being the FIDO U2F Security Key). I would like to have the ability to plug in the security key to the usb drive, and have it confirm (or deny) that it is correct by comparing it to the stored code. After confirmation it would then allow the device to unlock.