According to Apple, the security update to Magic Keyboard includes the standard accessory with Numeric Keypad, Touch ID, and Touch ID and Numeric Keypad. This is the first firmware update to these ...

It's even worse if you have the Magic Keyboard without a numeric keypad—the arrow keys are ... The Magic Keyboard with Touch ID and a numeric keyboard comes only in silver with the option ...

Touch ID is Apple's original attempt at biometric authentication still used today. It was first introduced in the iPhone 5S Home Button, then later implemented in iPads and the Mac Magic Keyboard.