---
title: P521.KeyAgreement.PublicKey.HPKEEphemeralPrivateKey
framework: cryptokit
role: symbol
role_heading: Type Alias
path: cryptokit/p521/keyagreement/publickey/hpkeephemeralprivatekey
---

# P521.KeyAgreement.PublicKey.HPKEEphemeralPrivateKey

The type of the ephemeral private key associated with this public key.

## Declaration

```swift
typealias HPKEEphemeralPrivateKey = P521.KeyAgreement.PrivateKey
```