---
title: kSecAttrPRFHmacAlgSHA224
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecattrprfhmacalgsha224
---

# kSecAttrPRFHmacAlgSHA224

Use the SHA224 algorithm.

## Declaration

```swift
let kSecAttrPRFHmacAlgSHA224: CFString
```