Apple Platform Security
- Welcome
- Intro to Apple platform security
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- Encryption and Data Protection overview
- Passcodes and passwords
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- Data Protection overview
- Data Protection
- Data Protection classes
- Keybags for Data Protection
- Protecting keys in alternate boot modes
- Protecting user data in the face of attack
- Sealed Key Protection (SKP)
- Activating data connections securely in iOS and iPadOS
- Role of Apple File System
- Keychain data protection
- Digital signing and encryption
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- Services security overview
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- Apple Pay security overview
- Apple Pay component security
- How Apple Pay keeps users’ purchases protected
- Payment authorization with Apple Pay
- Paying with cards using Apple Pay
- Contactless passes in Apple Pay
- Rendering cards unusable with Apple Pay
- Apple Card security
- Apple Cash security
- Tap to Pay on iPhone
- Secure Apple Messages for Business
- FaceTime security
- Glossary
- Document revision history
- Copyright

Intro to app security for iOS and iPadOS
Unlike other mobile platforms, iOS and iPadOS don’t allow users to install potentially malicious unsigned apps from websites or to run untrusted apps. At runtime, code signature checks that all executable memory pages are made as they are loaded to help ensure that an app hasn’t been modified since it was installed or last updated.
After an app is verified to be from an approved source, iOS and iPadOS enforce security measures designed to prevent it from compromising other apps or the rest of the system.
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