---
title: kSecMatchSubjectContains
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecmatchsubjectcontains
---

# kSecMatchSubjectContains

A key whose value is a string to look for in a certificate or identity’s subject.

## Declaration

```swift
let kSecMatchSubjectContains: CFString
```

## Discussion

Discussion The corresponding value is of type CFString. If provided, returned certificates or identities are limited to those whose subject contains this string.