---
title: errSSLATSLeafCertificateHashAlgorithmViolation
framework: security
role: symbol
role_heading: Global Variable
path: security/errsslatsleafcertificatehashalgorithmviolation
---

# errSSLATSLeafCertificateHashAlgorithmViolation

The peer leaf certificate hash algorithm isn’t App Transport Security compliant.

## Declaration

```swift
var errSSLATSLeafCertificateHashAlgorithmViolation: OSStatus { get }
```

## Overview

Overview For more information about App Transport Security (ATS) compliance, see Preventing Insecure Network Connections.