---
title: kSecOIDX509V3CertificateExtensionStruct
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecoidx509v3certificateextensionstruct
---

# kSecOIDX509V3CertificateExtensionStruct

## Declaration

```swift
let kSecOIDX509V3CertificateExtensionStruct: CFString
```