Apple Platform Security
- Welcome
- Intro to Apple platform security
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- System security overview
- Signed system volume security
- Secure software updates
- Rapid Security Responses
- Operating system integrity
- BlastDoor for Messages and IDS
- Lockdown Mode security
- System security for watchOS
- Random number generation
- Apple Security Research Device
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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
HomeKit data security
For homes that have been upgraded to the new HomeKit architecture (available in iOS 16.2 and iPadOS 16.2), HomeKit data is securely synchronized between a user’s Apple devices using iCloud and iCloud Keychain. During this process, the HomeKit data is encrypted using iCloud end-to-end encryption and isn’t accessible by Apple.
The user who initially created the home in HomeKit (the “owner”) or another user with editing permissions can add new users. The owner’s device configures the accessories with the public key of the new user so that the accessory can authenticate and accept commands from the new user. When a user with editing permissions adds a new user, the process is delegated to a home hub to complete the operation.
Home data and apps
Access to home data by apps is controlled by users in Privacy settings. Users are asked to grant access when apps request home data, similar to how to access Contacts, Photos, and other iOS, iPadOS, and macOS data sources works. If the user approves, apps have access to the names of rooms, names of accessories, the room each accessory is in, and other information as detailed in the HomeKit developer documentation at https://developer.apple.com/homekit/.
Local data storage
HomeKit stores data about the homes, accessories, scenes, and users on a user’s Apple devices. This data is stored using the Data Protection class Protected Until First User Authentication and within a data vault. HomeKit data isn’t backed up in local backups.