Sharepoint 2010 Client Object Model Remote Access via HTTPS - https

Question

I was encouraged to learn that the Sharepoint 2010 Client Object Model essentially wraps remote calls to the server. So, I copied the Microsoft.Sharepoint.Client.Silverlight.dll and Microsoft.Sharepoint.Client.Silverlight.Runtime.dll from my Sharepoint 2010 server to my development machine (without Sharepoint). I assumed the Silverlight code I tested on the Sharepoint 2010 server would also work on my development machine. Naturally, I don't use the "ApplicationContext.Current.Url" because I am not executing in Sharepoint, so I manually add sharepoint server name as follows (kept anonymous for the post):
//ClientContext context = new ClientContext(ApplicationContext.Current.Url);
ClientContext context = new ClientContext("https://[servername]");
_web = context.Web;
context.Load(_web);
context.Load(_web.Lists);
context.ExecuteQueryAsync(new ClientRequestSucceededEventHandler (OnRequestSucceeded), new ClientRequestFailedEventHandler(OnRequestFailed));
When I execute the code, I am prompted by a Windows Authentication window (Sharepoint is configured to use Windows Authentication), I add my domain/user and password. However, I am getting the following error:
Note: I was able to get Sharepoint 2010 web services working given a similar error by changing the binding security mode="Transport" and including a clientAccessPolicy.xml file on the Sharepoint root website. Do I need to configure another Sharepoint directory for thje Client Object Model endpoint?
Exception {System.Security.SecurityException ---> System.Security.SecurityException: Security error.
at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.b__4(Object sendState)
at System.Net.Browser.AsyncHelper.<>c__DisplayClass2.b__0(Object sendState)
--- End of inner exception stack trace ---
at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at Microsoft.SharePoint.Client.ClientRequest.ExecuteQueryGetResponseAsyncCallback(IAsyncResult asyncResult)} System.Exception {System.Security.SecurityException}

Answer 1

Please look in to the below blog post, you need to add clientaccesspolicy.xml file in your sharepoint website root folder.
http://vangalvenkat.blogspot.com/2011/08/sharepoint-2010-getting-list-item.html

Answer 2

Aha, I found it. You can set the security on the client context to use the default windows authentication like so:
using (Microsoft.Sharepoint.Client.ClientContext ctx = new Microsoft.Sharepoint.Client.ClientContext("http://sharepointserver")){
ctx.AuthenticationMode = Microsoft.Sharepoint.Client.ClientAuthenticationMode.Default
}
This should also prevent any windows authentication pop-ups