---
title: kSecTrustSettingsKeyUsage
framework: security
role: symbol
role_heading: Global Variable
path: security/ksectrustsettingskeyusage
---

# kSecTrustSettingsKeyUsage

A number specifying the operations for which the encryption key in this certificate can be used.

## Declaration

```swift
var kSecTrustSettingsKeyUsage: String { get }
```

## Discussion

Discussion The value is a CFNumber object containing an SInt32 value.