<!--
{
  "availability" : [
    "macOS: 10.7.0 - 13.0.0"
  ],
  "documentType" : "symbol",
  "framework" : "Security",
  "identifier" : "/documentation/Security/SecTransformAttribute",
  "metadataVersion" : "0.1.0",
  "role" : "Type Alias",
  "symbol" : {
    "kind" : "Type Alias",
    "modules" : [
      "Security"
    ],
    "preciseIdentifier" : "c:@T@SecTransformAttributeRef"
  },
  "title" : "SecTransformAttribute"
}
-->

# SecTransformAttribute

A direct reference to a security transform attribute.

```
typealias SecTransformAttribute = CFTypeRef
```

## Discussion

Using an attribute reference rather than referring to it by name, such as in calls to the [`SecTransformCustomSetAttribute(_:_:_:_:)`](/documentation/Security/SecTransformCustomSetAttribute(_:_:_:_:)) function, speeds up the operation.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)