---
title: NSURLAuthenticationMethodClientCertificate
framework: foundation
role: symbol
role_heading: Global Variable
path: foundation/nsurlauthenticationmethodclientcertificate
---

# NSURLAuthenticationMethodClientCertificate

Use client certificate authentication for this protection space.

## Declaration

```swift
let NSURLAuthenticationMethodClientCertificate: String
```

## Discussion

Discussion This authentication method can apply to any protocol.

## See Also

### Session-wide authentication challenges

- [NSURLAuthenticationMethodNegotiate](foundation/nsurlauthenticationmethodnegotiate.md)
- [NSURLAuthenticationMethodNTLM](foundation/nsurlauthenticationmethodntlm.md)
- [NSURLAuthenticationMethodServerTrust](foundation/nsurlauthenticationmethodservertrust.md)