.You can use the link https://testservices.nic.in/examsys/root/Home.aspx?enc=Ei4cajBkK1gZSfgr53ImFf7lPhkAc4HHbNqNTl8d1hk= to login. If you already registered, click on "Registered Candidates Sign in". Enter your application number and password. The security pin is nothing bu the alpha numerics mentioned in the box just below the security pin. Enter that the same it is and click on Submit. It will take you to your application.