---
title: "webView(_:authenticationChallenge:shouldAllowDeprecatedTLS:)"
framework: webkit
role: symbol
role_heading: Instance Method
path: "webkit/wknavigationdelegate/webview(_:authenticationchallenge:shouldallowdeprecatedtls:)"
---

# webView(_:authenticationChallenge:shouldAllowDeprecatedTLS:)

Asks the delegate whether to continue with a connection that uses a deprecated version of TLS.

## Declaration

```swift
optional func webView(_ webView: WKWebView, authenticationChallenge challenge: URLAuthenticationChallenge, shouldAllowDeprecatedTLS decisionHandler: @escaping @MainActor @Sendable (Bool) -> Void)
```

```swift
optional func webView(_ webView: WKWebView, shouldAllowDeprecatedTLSFor challenge: URLAuthenticationChallenge) async -> Bool
```

## Parameters

- `webView`: The web view that receives the authentication challenge.
- `challenge`: The authentication challenge.
- `decisionHandler`: The completion handler block to execute with the decision. This handler has no return value and takes the following parameter:

## Discussion

Discussion If you don’t implement this method, the web view uses system settings to determine whether to allow the use of deprecated versions of TLS.

## See Also

### Responding to authentication challenges

- [webView(_:didReceive:completionHandler:)](webkit/wknavigationdelegate/webview(_:didreceive:completionhandler:).md)