The data in the keychain can only be accessed when the device is unlocked. Only available if a passcode is set on the device.
- iOS 8.0+
- macOS 10.10+
- tvOS 9.0+
- watchOS 2.0+
This is recommended for items that only need to be accessible while the application is in the foreground. Items with this attribute never migrate to a new device. After a backup is restored to a new device, these items are missing. No items can be stored in this class on devices without a passcode. Disabling the device passcode causes all items in this class to be deleted.