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SiriKit security for iOS, iPadOS, and watchOS

Siri uses the app extension system to communicate with third-party apps. On a device, Siri can access the users contact information and the devices current location. But before it provides protected data to an app, Siri checks the apps user-controlled access permissions. According to those permissions, Siri passes only the relevant fragment of the original user utterance to the app extension. For example, if an app doesnt have access to contact information, Siri wont resolve a relationship in a user request such as Pay my mother 10 dollars using Payment App. In this case, the app would see only the literal term my mother.

However, if the user has granted the app access to contact information, the app would receive resolved information about the users mother. If a relationship is referenced in the body portion of a messagefor example, Tell my mother on MessageApp that my brother is awesomeSiri doesnt resolve my brother regardless of the apps permissions.

SiriKit-enabled apps can send app-specific or user-specific vocabulary to Siri, such as the names of the users contacts. This information allows Siris speech recognition and natural language understanding to recognize vocabulary for that app and is associated with a random identifier. The custom information remains available as long as the identifier is in use, or until the user turns off the apps Siri integration in Settings, or until the SiriKit-enabled app is uninstalled.

For an utterance like Get me a ride to my moms home using RideShareApp, the request requires location data from the users contacts. For that request only, Siri provides the required information to the apps extension, regardless of the user permission settings for location or contact information for the app.

Published Date: February 18, 2021

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Apple Platform Security

SiriKit security for iOS, iPadOS, and watchOS

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