---
title: kSecPolicyKU_KeyCertSign
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecpolicyku_keycertsign
---

# kSecPolicyKU_KeyCertSign

If true, the certificate’s key usage must allow it to be used for signing certificates.

## Declaration

```swift
let kSecPolicyKU_KeyCertSign: CFString
```