---
title: SecKeyGetTypeID()
framework: security
role: symbol
role_heading: Function
path: security/seckeygettypeid()
---

# SecKeyGetTypeID()

Returns the unique identifier of the opaque type to which a key object belongs.

## Declaration

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

## Return Value

Return Value A value that identifies the opaque type of a SecKey object.

## Discussion

Discussion This function returns a value that uniquely identifies the opaque type of a SecKey object. You can compare this value to the CFTypeID identifier obtained by calling the CFGetTypeID(_:) function on a specific object. These values might change from release to release or platform to platform.