title: Does Cloudera Navigator Key Trustee Server ,Cloudera Navigator Key HSM , Cloudera Navigator Key Trustee KMS necessary for Impala installation?
body: <p>I am installing Impala using Cloudera manager. And they are saying to install  </p>
  
  <p>1  Cloudera Navigator Key Trustee Server<br>
  2 Cloudera Navigator Key HSM<br>
  3  Cloudera Navigator Key Trustee KMS<br>
  4  Cloudera Navigator Encrypt  </p>
  
  <p>while these installations required enterprise licence. Is it necessary for Impala?</p>