---
title: kSecMatchWidthInsensitive
framework: security
role: symbol
role_heading: Global Variable
path: security/ksecmatchwidthinsensitive
---

# kSecMatchWidthInsensitive

A key whose value is a Boolean indicating whether width-insensitive matching is performed.

## Declaration

```swift
let kSecMatchWidthInsensitive: CFString
```

## Discussion

Discussion The corresponding value is of type CFBoolean. If this value is kCFBooleanFalse, or if this attribute is not provided, then width-sensitive string matching is performed (for example, the ASCII character a does not match the UTF-8 full-width letter a (U+FF41).