title: lua aes encryption
body: <p>I found a "lua aes" solution on the web a while ago. And have some concern about its safety.</p>
  
  <p>It states that:</p>
  
  <blockquote>
    <p>-- Do not use for real encryption, because the password is easily viewable while encrypting.</p>
  </blockquote>
  
  <p>It says this at its "file encryption test" script.</p>
  
  <p>My questions are:</p>
  
  <p>Why is that, how is it any different from encrypting a string and writing it to a file?</p>
  
  <p>How could it be viewable while encryption? Is it viewable after encryption too?</p>
  
  <p>Basically, Is it safe to use or not?</p>
  
  <p>Is there anyone who can confirm this who has used it? I mailed the original developer but the email address was invalid.</p>
  
  <p>Should I be using it at all?</p>