---
title: kSecAttrApplicationTag
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecattrapplicationtag
---

# kSecAttrApplicationTag

A key whose value indicates the item’s private tag.

## Declaration

```swift
let kSecAttrApplicationTag: CFString
```

## Mentioned in

Generating New Cryptographic Keys

## Discussion

Discussion The corresponding value is of type CFData and contains private tag data. On key creation, if not explicitly specified, this attribute defaults to NULL.