---
title: NSURLAuthenticationMethodNegotiate
framework: foundation
role: symbol
role_heading: Global Variable
path: foundation/nsurlauthenticationmethodnegotiate
---

# NSURLAuthenticationMethodNegotiate

Negotiate whether to use Kerberos or NTLM authentication for this protection space.

## Declaration

```swift
let NSURLAuthenticationMethodNegotiate: String
```

## See Also

### Session-wide authentication challenges

- [NSURLAuthenticationMethodClientCertificate](foundation/nsurlauthenticationmethodclientcertificate.md)
- [NSURLAuthenticationMethodNTLM](foundation/nsurlauthenticationmethodntlm.md)
- [NSURLAuthenticationMethodServerTrust](foundation/nsurlauthenticationmethodservertrust.md)