diff --git a/AFNetworking/AFURLConnectionOperation.m b/AFNetworking/AFURLConnectionOperation.m
index 04e9e52..ca97832 100644
--- a/AFNetworking/AFURLConnectionOperation.m
+++ b/AFNetworking/AFURLConnectionOperation.m
@@ -668,25 +668,8 @@ didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
         self.authenticationChallenge(connection, challenge);
     } else {
         if ([challenge previousFailureCount] == 0) {
-            NSURLCredential *credential = nil;
-            
-            NSString *user = [[self.request URL] user];
-            NSString *password = [[self.request URL] password];
-            
-            if (user && password) {
-                credential = [NSURLCredential credentialWithUser:user password:password persistence:NSURLCredentialPersistenceNone];
-            } else if (user) {
-                credential = [[[NSURLCredentialStorage sharedCredentialStorage] credentialsForProtectionSpace:[challenge protectionSpace]] objectForKey:user];
-            } else {
-                credential = [[NSURLCredentialStorage sharedCredentialStorage] defaultCredentialForProtectionSpace:[challenge protectionSpace]];
-            }
-            
-            if (!credential) {
-                credential = self.credential;
-            }
-            
-            if (credential) {
-                [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
+            if (self.credential) {
+                [[challenge sender] useCredential:self.credential forAuthenticationChallenge:challenge];
             } else {
                 [[challenge sender] continueWithoutCredentialForAuthenticationChallenge:challenge];
             }