<!--
{
  "availability" : [
    "iOS: 15.0.0 -",
    "iPadOS: 15.0.0 -",
    "macCatalyst: 15.0.0 -",
    "macOS: 12.0.0 -",
    "tvOS: 16.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AuthenticationServices",
  "identifier" : "/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertion",
  "metadataVersion" : "0.1.0",
  "role" : "Protocol",
  "symbol" : {
    "kind" : "Protocol",
    "modules" : [
      "Authentication Services"
    ],
    "preciseIdentifier" : "c:objc(pl)ASAuthorizationPublicKeyCredentialAssertion"
  },
  "title" : "ASAuthorizationPublicKeyCredentialAssertion"
}
-->

# ASAuthorizationPublicKeyCredentialAssertion

An interface for establishing a public key-based assertion.

```
protocol ASAuthorizationPublicKeyCredentialAssertion : ASPublicKeyCredential
```

## Overview

Both [`ASAuthorizationSecurityKeyPublicKeyCredentialAssertion`](/documentation/AuthenticationServices/ASAuthorizationSecurityKeyPublicKeyCredentialAssertion) and [`ASAuthorizationPlatformPublicKeyCredentialAssertion`](/documentation/AuthenticationServices/ASAuthorizationPlatformPublicKeyCredentialAssertion) adhere to this interface.

## Topics

### Getting the properties

[`var signature: Data!`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertion/signature)

The signature for the assertion.

[`var userID: Data!`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertion/userID)

A user identifier for the assertion.

[`var rawAuthenticatorData: Data!`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialAssertion/rawAuthenticatorData)

A byte sequence that contains additional information about the credential.

## Relationships

### Inherits From

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

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

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

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

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

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

### Conforming Types

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

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

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)