title: Create new file with custom file extension?
body: <p>How can I create a new file with a file format of say .kuy.This file would be holding encrypted data. And then later I could choose that file with extension .kuy to decrypt. So if I encrypted soundfile.aup, the encrypted file would be soundfile.aup.kuy, then the user would proceed to decrypting that file in which case the output would be soundfile.aup.</p>
  
  <p>Thank you,</p>
  
  <p>Bobby</p>