LAST week, the world woke up to the largest cyber security threat ever, with a ransomware wannacry originating from NSA's cache of cyber weapons, infecting hundreds of thousands of computers. Computers in more than 150 countries have been infected by the ransomware, with the users locked out of their vital files and data. The criminal group behind wannacry want $300 in bitcoin as ransom, for releasing the files back to their users. The ransom note, displayed on the hacked machines, also say that the ransom will double if the victims do not pay up within three days.