---
title: challenge
framework: authenticationservices
role: symbol
role_heading: Instance Property
path: authenticationservices/aspublickeycredentialclientdata-swift.struct/challenge
---

# challenge

## Declaration

```swift
var challenge: Data
```

## See Also

### Instance Properties

- [crossOrigin](authenticationservices/aspublickeycredentialclientdata-swift.struct/crossorigin.md)
- [origin](authenticationservices/aspublickeycredentialclientdata-swift.struct/origin.md)
- [topOrigin](authenticationservices/aspublickeycredentialclientdata-swift.struct/toporigin.md)