---
title: errSecUnsupportedKeyUsageMask
framework: security
role: symbol
role_heading: Global Variable
path: security/errsecunsupportedkeyusagemask
---

# errSecUnsupportedKeyUsageMask

The key usage mask is not supported.

## Declaration

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