---
title: kSecOIDX509V3CertificateExtensionType
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecoidx509v3certificateextensiontype
---

# kSecOIDX509V3CertificateExtensionType

## Declaration

```swift
let kSecOIDX509V3CertificateExtensionType: CFString
```