---
title: ecdsaSignatureMessageRFC4754SHA1
framework: security
role: symbol
role_heading: Type Property
path: security/seckeyalgorithm/ecdsasignaturemessagerfc4754sha1
---

# ecdsaSignatureMessageRFC4754SHA1

An algorithm for generating message signatures by calculating and signing the SHA1 message digest.

## Declaration

```swift
static let ecdsaSignatureMessageRFC4754SHA1: SecKeyAlgorithm
```