Earlier this afternoon Patently Apple posted a report titled "The Revised iPad's Touch ID Button System could one day be applied to a Future Apple Watch." While we're on the topic of Touch ID, a second patent application was published today by the U.S. Patent Office titled "Split Processing of Biometric Data." Apple's patent application explains that there's more to the Touch ID button system on a MacBook or Magic Keyboard that meets the eye. In order to secure the user's fingerprint data, the Touch ID button is only half of the equation, with the host device doing most of the heavy lifting in respect to security.