---
title: ASAuthorizationPlatformPublicKeyCredentialAssertion
framework: authenticationservices
role: symbol
role_heading: Class
path: authenticationservices/asauthorizationplatformpublickeycredentialassertion
---

# ASAuthorizationPlatformPublicKeyCredentialAssertion

A class that represents the platform credential assertion type.

## Declaration

```swift
class ASAuthorizationPlatformPublicKeyCredentialAssertion
```

## Overview

Overview The device creates an assertion when signing in with an existing credential. Use this class to verify the platform credential assertion when the authorization controller calls authorizationController(controller:didCompleteWithAuthorization:).

## Topics

### Creating requests

- [ASAuthorizationPlatformPublicKeyCredentialAssertionRequest](authenticationservices/asauthorizationplatformpublickeycredentialassertionrequest.md)
- [ASAuthorizationPlatformPublicKeyCredentialDescriptor](authenticationservices/asauthorizationplatformpublickeycredentialdescriptor.md)

### Accessing assertion properties

- [largeBlob](authenticationservices/asauthorizationplatformpublickeycredentialassertion/largeblob-29ggs.md)

### Initializers

- [init(coder:)](authenticationservices/asauthorizationplatformpublickeycredentialassertion/init(coder:).md)

### Instance Properties

- [attachment](authenticationservices/asauthorizationplatformpublickeycredentialassertion/attachment.md)
- [prf](authenticationservices/asauthorizationplatformpublickeycredentialassertion/prf-8o9sr.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [ASAuthorizationCredential](authenticationservices/asauthorizationcredential.md)
- [ASAuthorizationPublicKeyCredentialAssertion](authenticationservices/asauthorizationpublickeycredentialassertion.md)
- [ASPublicKeyCredential](authenticationservices/aspublickeycredential.md)
- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Account authentication

- [ASAuthorizationPublicKeyCredentialAssertion](authenticationservices/asauthorizationpublickeycredentialassertion.md)
- [ASAuthorizationSecurityKeyPublicKeyCredentialAssertion](authenticationservices/asauthorizationsecuritykeypublickeycredentialassertion.md)
- [ASAuthorizationPublicKeyCredentialAssertionRequest](authenticationservices/asauthorizationpublickeycredentialassertionrequest.md)
- [ASAuthorizationPlatformPublicKeyCredentialAssertionRequest](authenticationservices/asauthorizationplatformpublickeycredentialassertionrequest.md)
- [ASAuthorizationSecurityKeyPublicKeyCredentialAssertionRequest](authenticationservices/asauthorizationsecuritykeypublickeycredentialassertionrequest.md)