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# ASAuthorizationPublicKeyCredentialAssertionRequest

An interface for requesting a public key-based credential assertion.

```
protocol ASAuthorizationPublicKeyCredentialAssertionRequest : NSCopying, NSSecureCoding, NSObjectProtocol
```

## Topics

### Getting the properties

[`challenge`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/challenge)

The challenge to sign.

[`relyingPartyIdentifier`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/relyingPartyIdentifier)

The domain name of the website for the credential.

[`allowedCredentials`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/allowedCredentials)

A list of allowed credential descriptors the user attempts to sign in with.

[`userVerificationPreference`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/userVerificationPreference)

A preference that indicates whether the authenticator attempts to verify the user at the time of sign-in.


---

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