Bio-Key SideTouch USB Fingerprint Reader for Windows 8.1/10 Looking for spy-level security access for your device? Try the Bio-key SideTouch fingerprint reader. Designed by Microsoft to operate on the Windows Hello biometric sign-in platform, it eliminates the need for passwords or PINs when signing onto your device. You can use it on multiple devices and with multiple users too. Yesterday's science fiction. Today's secure sign on. No spy credentials necessary.