---
title: sourceAppUniqueIdentifier
framework: networkextension
role: symbol
role_heading: Instance Property
path: networkextension/nefilterflow/sourceappuniqueidentifier
---

# sourceAppUniqueIdentifier

A byte string that uniquely identifies the binary for each build of the app that is the source of the flow.

## Declaration

```swift
var sourceAppUniqueIdentifier: Data? { get }
```

## See Also

### Source app identification

- [sourceAppIdentifier](networkextension/nefilterflow/sourceappidentifier.md)
- [sourceAppVersion](networkextension/nefilterflow/sourceappversion.md)
- [sourceAppAuditToken](networkextension/nefilterflow/sourceappaudittoken.md)
- [sourceProcessAuditToken](networkextension/nefilterflow/sourceprocessaudittoken.md)