---
title: "signMessageECDSA_DER(_:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrkeypair/signmessageecdsa_der(_:)"
---

# signMessageECDSA_DER(_:)

## Declaration

```swift
optional func signMessageECDSA_DER(_ message: Data) -> Data
```