---
title: HPKE.KDF.HKDF_SHA512
framework: cryptokit
role: symbol
role_heading: Case
path: cryptokit/hpke/kdf/hkdf_sha512
---

# HPKE.KDF.HKDF_SHA512

An HMAC-based key derivation function that uses SHA-2 hashing with a 512-bit digest.

## Declaration

```swift
case HKDF_SHA512
```