---
title: SecDigestTransformGetTypeID()
framework: security
role: symbol
role_heading: Function
path: security/secdigesttransformgettypeid()
---

# SecDigestTransformGetTypeID()

Returns the unique identifier of the opaque type to which a digest transform belongs.

## Declaration

```swift
func SecDigestTransformGetTypeID() -> CFTypeID
```

## Return Value

Return Value A value that identifies the opaque type of a SecTransform object meant for digests.