1. http://www.codeproject.com/Articles/134730/Applied-OpenSSL-CTR-Mode-in-File-Encryption
  2. http://openssh.turbolinux.org/tag/openssl/page/5
  3. http://tombuntu.com/index.php/2007/12/12/simple-file-encryption-with-openssl/
  4. http://www.openlogic.com/wazi/bid/188072/
  5. http://www.scribd.com/doc/2762281/Using-the-openssl-commandline-program
  6. https://www.google.com.au/search?oq=ctr+mode+des&sugexp=chrome,mod=10&sourceid=chrome&ie=UTF-8&q=ctr+mode+des#hl=en&sclient=psy-ab&q=ctr+mode+des+openssl+cygwin&oq=ctr+mode+des+openssl+cygwin&gs_l=serp.3..33i21.2412.4811.0.4992.15.15.0.0.0.0.268.2908.2-13.13.0.les%3B..0.0...1c.1.7n01gCwaHHQ&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&fp=37fc7606ff53045&biw=1920&bih=912