---
title: kSecAttrPRFHmacAlgSHA256
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecattrprfhmacalgsha256
---

# kSecAttrPRFHmacAlgSHA256

Use the SHA256 algorithm.

## Declaration

```swift
let kSecAttrPRFHmacAlgSHA256: CFString
```