title: Writing secure batch files
body: <p>I have a simple batch file:</p>
  
  <pre><code>@echo off
  set username=user
  set password=pass
  ::do some things with the username and password
  </code></pre>
  
  <p>the user could just call the batch file from cmd, and type <code>set</code> after my batch file has run it's course and see the username and password.
  Is there any way to fix this?
  (excluding bat to exe converters)</p>