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# ASAuthorizationPlatformPublicKeyCredentialAssertionRequest

The concrete assertion request type for platform credentials.

```
class ASAuthorizationPlatformPublicKeyCredentialAssertionRequest
```

## Overview

Use this class to sign in with an existing credential that the system stores in iCloud Keychain.

## Topics

### Accessing request properties

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

The array of allowed credentials.

[`largeBlob`](/documentation/AuthenticationServices/ASAuthorizationPlatformPublicKeyCredentialAssertionRequest/largeBlob-9kvvl)

The request’s binary large object value.

[`largeBlob`](/documentation/AuthenticationServices/ASAuthorizationPlatformPublicKeyCredentialAssertionRequest/largeBlob-5mg1q)

The request’s binary large object value.

[`prf`](/documentation/AuthenticationServices/ASAuthorizationPlatformPublicKeyCredentialAssertionRequest/prf-47uoa)

[`ASAuthorizationPublicKeyCredentialPRFAssertionInput`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialPRFAssertionInput-c.class)

A type that represents input for the web authentication PRF extension in passkey assertion requests.

## Relationships

### Conforms To

[`Equatable`](/documentation/Swift/Equatable)

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

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Escapable`](/documentation/Swift/Escapable)

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

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

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`CVarArg`](/documentation/Swift/CVarArg)

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

[`Sendable`](/documentation/Swift/Sendable)

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

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

[`Hashable`](/documentation/Swift/Hashable)

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

[`Copyable`](/documentation/Swift/Copyable)

### Inherits From

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

---

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