---
title: prf
framework: authenticationservices
role: symbol
role_heading: Instance Property
path: authenticationservices/aspasskeyregistrationcredentialextensionoutput-swift.struct/prf
---

# prf

The outputs of the WebAuthn PRF extension in passkey registration requests.

## Declaration

```swift
var prf: ASAuthorizationPublicKeyCredentialPRFRegistrationOutput? { get }
```

## See Also

### Inspecting properties

- [largeBlob](authenticationservices/aspasskeyregistrationcredentialextensionoutput-swift.struct/largeblob.md)
- [ASAuthorizationPublicKeyCredentialLargeBlobRegistrationOutput](authenticationservices/asauthorizationpublickeycredentiallargeblobregistrationoutput-swift.struct.md)
- [ASAuthorizationPublicKeyCredentialPRFRegistrationOutput](authenticationservices/asauthorizationpublickeycredentialprfregistrationoutput-swift.struct.md)