Apple Platform Security
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Welcome
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Intro to Apple platform security
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System security overview
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Secure software updates
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Operating system integrity
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Additional macOS system security capabilities
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Signed system volume security
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System Integrity Protection
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Trust caches
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Peripheral processor security
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Rosetta 2 on a Mac with Apple silicon
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Direct memory access protections
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Kernel extensions
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Option ROM security
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UEFI firmware security in an Intel-based Mac
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System security for watchOS
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Random number generation
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Apple Security Research Device
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Encryption and Data Protection overview
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Passcodes and passwords
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Data Protection overview
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Data Protection
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Data Protection classes
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Keybags for Data Protection
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Protecting keys in alternate boot modes
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Protecting user data in the face of attack
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Sealed Key Protection (SKP)
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Activating data connections securely in iOS and iPadOS
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Role of Apple File System
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Keychain data protection
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Digital signing and encryption
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Services security overview
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Apple Pay security overview
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Apple Pay component security
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Secure Element and NFC controller
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Payment authorization with Apple Pay
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Paying with cards using Apple Pay
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Contactless passes in Apple Pay
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Rendering cards unusable with Apple Pay
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Apple Cash security
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Apple Card security
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Adding transit and student ID cards to Wallet
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Business Chat security
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FaceTime security
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Apple car keys security
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Glossary
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Document revision history
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Copyright

Ultra Wideband security in iOS
The new Apple‑designed U1 chip uses Ultra Wideband technology for spatial awareness—allowing iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max or later iPhone models to precisely locate other U1‑equipped Apple devices. Ultra Wideband technology uses the same technology to randomize data found in other supported Apple devices:
MAC address randomization
Wi-Fi frame sequence number randomization
See alsoWi-Fi privacy
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