A computer hacker is an online security expert who exploits weaknesses in a computer system or network. The term 'white hat' refers to hackers who operate for non-malicious reasons, for example, ...

A man in a black hoodie wearing a Guy Fawkes mask sits in a dark room, face lit up forebodingly by his laptop screen. He types furiously, laying down dozens of lines of code. After a few moments go by ...