PIN transaction protection.
Transactions that require PIN entry will automatically prompt a PIN entry screen when using Tap to Pay on iPhone. When that screen appears, Tap to Pay on iPhone is designed to prevent apps in the background from reading sensors that could give away any part of the PIN. When a payment is processed, Tap to Pay on iPhone is designed to prevent all photo, video, screenshot, and screen-recording features on the merchant’s iPhone from capturing a customer’s card number or PIN information.