Authentication Class

Specifies a client proxy that provides user authentication for SharePoint sites that use forms-based authentication.

Web Service: AuthenticationWeb Reference: http://<Site>/_vti_bin/Authentication.asmx

<DebuggerStepThroughAttribute> _
<WebServiceBindingAttribute(Name:="AuthenticationSoap", Web Service:="http://schemas.microsoft.com/sharepoint/soap/")> _
<DesignerCategoryAttribute("code")> _
<GeneratedCodeAttribute("wsdl", "2.0.50727.42")> _
Public Class Authentication
    Inherits SoapHttpClientProtocol

Dim instance As Authentication

[DebuggerStepThroughAttribute] 
[WebServiceBindingAttribute(Name="AuthenticationSoap", Web Service="http://schemas.microsoft.com/sharepoint/soap/")] 
[DesignerCategoryAttribute("code")] 
[GeneratedCodeAttribute("wsdl", "2.0.50727.42")] 
public class Authentication : SoapHttpClientProtocol

There are three authentication systems available to SharePoint sites: Windows authentication, Microsoft Windows Live ID authentication (formerly known as "Passport" authentication), and Forms authentication. For more information about types of authentication, see ASP.NET Authentication.

System.Object
   System.MarshalByRefObject
     System.ComponentModel.Component
       System.Web.Services.Protocols.WebClientProtocol
         System.Web.Services.Protocols.HttpWebClientProtocol
           System.Web.Services.Protocols.SoapHttpClientProtocol
            Authentication.Authentication

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Authentication Members
Authentication Web Service

Authorization and Authentication
ASP.NET Authentication