For a thorough understanding you should ensure that you have read documentation relating to securing services in ArcGIS Server, see the latest ArcGIS Server security documentation for more details. The following is a suggested set of pre-requisite actions to be completed prior to adding secured services to Dekho.
§ Use ArcGIS Server Manager to configure security for ArcGIS Server services;
§ Enable security on the Geometry Service and generate a token;
§ Configure SSL on the web server hosting your ArcGIS Server instance (i.e. IIS);
§ Test secure access to your services via the ArcGIS Services Directory (REST);
§ Configure ArcGIS Server to allow user to request a long lived token;
§ Install Certificate on JVM;
§ Test token requests against your ArcGIS Server and
§ Test printing using the custom secured printing service.