Researchers: an AirDrop user's phone number and email address can be learned via nearby Wi-Fi-capable devices when they open an iOS or macOS sharing pane (Technical University of Darmstadt)

Technical University of Darmstadt:
Researchers: an AirDrop user's phone number and email address can be learned via nearby Wi-Fi-capable devices when they open an iOS or macOS sharing pane  —  TU-Researchers discover significant privacy leak in Apple's file-sharing service  —  Apple users can share files with each other using AirDrop.

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