how the digest authentication work

hi
i have host wcf service on iis 6.0 and secure as digest authentication below is my server side
web.config.



 

 
   

   

 
 
   
     
       
         
       
     
   
 
 

     
       
         
                                   proxyCredentialType="Digest" />
         
       
     
   
   
     
       
            contract="WsServiceContract.ICustomer">
         

           

         
       

       
     
   
   
     
       
         
       
     
   
   
 
 
   
 




an consuming on client side like this





CustomerSale objService = new CustomerSale ();
               
                    dt.TableName = "client";
                    String MyURI = "http://url/ClientSale.svc";
                    WebRequest WReq = WebRequest.Create(MyURI);
                    WReq.Credentials = new NetworkCredential("myusername","mypass");
                    objService.UpdateSales();