---
title: keySystem
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcontentkeysession/keysystem
---

# keySystem

The type of key system used to retrieve keys.

## Declaration

```swift
var keySystem: AVContentKeySystem { get }
```

## Discussion

Discussion Valid values for keySystem are fairPlayStreaming and clearKey.

## See Also

### Inspecting the session

- [AVContentKeySystem](avfoundation/avcontentkeysystem.md)
- [storageURL](avfoundation/avcontentkeysession/storageurl.md)