public void ConfigureAuth(IAppBuilder app)
{
	        var protectionProvider = DataProtectionProvider.Create(
	            new DirectoryInfo(@"c:\temp\keyring"));
	        var dataProtector = protectionProvider.CreateProtector(
	            "CookieAuthenticationMiddleware",
	            "Cookie",
	            "v2");
	        var ticketFormat = new AspNetTicketDataFormat(new DataProtectorShim(dataProtector));

      app.UseCookieAuthentication(
	            new CookieAuthenticationOptions
	            {
	                AuthenticationType =
	                    WsFederationAuthenticationDefaults.AuthenticationType,
                    CookieName= ".AspNet.SharedCookie",
                    TicketDataFormat = ticketFormat
                });

}