title: AES algorithm input and output restrictions
body: <p>I want to use AES encryption in my application. I have come across some open source implementations of aes algorithm. By looking at them, I am confused about the following parameters:</p>
  
  <ol>
  <li><p>AES key length. It is mentioned that key length should be 128, 192 or 256 bytes. What if my key is simply five digits i.e. 23467</p></li>
  <li><p>AES plain-text length : is there any restriction on the aes plain-text length ?</p></li>
  <li><p>AES output: What would be the minimum size of aes output string if my key length is say 5 digits and plain-text is say 10 characters.</p></li>
  </ol>
  
  <p>Can anyone help me?</p>