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# ASAuthorizationPublicKeyCredentialAssertionRequest

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

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

## Topics

### Getting the properties

[`var challenge: Data`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/challenge)

The challenge to sign.

[`var relyingPartyIdentifier: String`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/relyingPartyIdentifier)

The domain name of the website for the credential.

[`var allowedCredentials: [any ASAuthorizationPublicKeyCredentialDescriptor]`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/allowedCredentials)

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

[`var userVerificationPreference: ASAuthorizationPublicKeyCredentialUserVerificationPreference`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertionRequest/userVerificationPreference)

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

## Relationships

### Inherits From

[`NSCopying`](/documentation/Foundation/NSCopying)

[`NSCoding`](/documentation/Foundation/NSCoding)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`NSSecureCoding`](/documentation/Foundation/NSSecureCoding)

### Conforming Types

[`ASAuthorizationSecurityKeyPublicKeyCredentialAssertionRequest`](/documentation/AuthenticationServices/ASAuthorizationSecurityKeyPublicKeyCredentialAssertionRequest)

[`ASAuthorizationPlatformPublicKeyCredentialAssertionRequest`](/documentation/AuthenticationServices/ASAuthorizationPlatformPublicKeyCredentialAssertionRequest)

---

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