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# ASAuthorizationProviderExtensionKeyType

The key types for platform single sign-on.

```
enum ASAuthorizationProviderExtensionKeyType
```

## Topics

### Identifying the key types

[`ASAuthorizationProviderExtensionKeyType.userDeviceEncryption`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/userDeviceEncryption)

The user device encryption key.

[`ASAuthorizationProviderExtensionKeyType.userDeviceSigning`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/userDeviceSigning)

The user device signing key.

[`ASAuthorizationProviderExtensionKeyType.userSecureEnclaveKey`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/userSecureEnclaveKey)

The user Secure Enclave key.

### Enumeration Cases

[`ASAuthorizationProviderExtensionKeyType.currentDeviceEncryption`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/currentDeviceEncryption)

[`ASAuthorizationProviderExtensionKeyType.currentDeviceSigning`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/currentDeviceSigning)

[`ASAuthorizationProviderExtensionKeyType.sharedDeviceEncryption`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/sharedDeviceEncryption)

[`ASAuthorizationProviderExtensionKeyType.sharedDeviceSigning`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/sharedDeviceSigning)

[`ASAuthorizationProviderExtensionKeyType.userSmartCard`](/documentation/AuthenticationServices/ASAuthorizationProviderExtensionKeyType/userSmartCard)


---

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