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# ASAuthorizationPublicKeyCredentialDescriptor

An interface that defines the credential identifier.

```
protocol ASAuthorizationPublicKeyCredentialDescriptor : NSCopying, NSSecureCoding, NSObjectProtocol
```

## Topics

### Getting the credential

[`var credentialID: Data`](/documentation/AuthenticationServices/ASAuthorizationPublicKeyCredentialDescriptor/credentialID)

An identifier the authenticator generates during registration to uniquely identify a specific credential.

## Relationships

### Conforming Types

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

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

### Inherits From

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

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

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

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

---

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