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

# prf

Input for the WebAuthn PRF extension in passkey registration requests.

## Declaration

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

## See Also

### Inputs

- [largeBlob](authenticationservices/aspasskeyregistrationcredentialextensioninput-swift.struct/largeblob.md)
- [ASAuthorizationPublicKeyCredentialLargeBlobRegistrationInput](authenticationservices/asauthorizationpublickeycredentiallargeblobregistrationinput-swift.struct.md)
- [ASAuthorizationPublicKeyCredentialPRFRegistrationInput](authenticationservices/asauthorizationpublickeycredentialprfregistrationinput-swift.struct.md)