title: how to enable system firmware key
body: <p>System signature key  should be used in order to sign my application with system privileges, . But, I donot know. So I have questions ;</p>
  
  <ul>
  <li>How can I sign my application with system firmware key ?</li>
  <li>What are the requirement ? </li>
  <li>What should I do, step by step?</li>
  </ul>