Interesting hack where the author uses Googles authenticator (OTP I believe) to get tokens to provide to the arduino to authenticate with. Which the video was in english.
http://hackaday.com/2013/09/14/using-google-authenticator-with-an-arduino/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+hackaday%2FLgoM+%28Hack+a+Day%29/