The primary components are the fingerprint sensor and Microsoft’s Secure Device Connection Protocol (SDCP), with the latter tasked with securing the (USB) connection between the sensor and the host.

The Galaxy S10 is interesting for its use of an ultrasonic fingerprint sensor, which continues to push to hardware development of phones minimal-to-no bezels by placing the sensor below the screen.

He surmised it is likely due to the Pixel 7's use of an optical fingerprint sensor that needs to light up the screen under his thumb to illuminate his finger in order to get a reading. The Pixel 9 ...