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

# prf

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

## Declaration

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

## See Also

### Inspecting properties

- [largeBlob](authenticationservices/aspasskeyassertioncredentialextensionoutput-swift.struct/largeblob.md)
- [ASAuthorizationPublicKeyCredentialLargeBlobAssertionOutput](authenticationservices/asauthorizationpublickeycredentiallargeblobassertionoutput-swift.struct.md)
- [ASAuthorizationPublicKeyCredentialPRFAssertionOutput](authenticationservices/asauthorizationpublickeycredentialprfassertionoutput-swift.struct.md)