A TYPE of wallpaper that prevents Wi-Fi signals escaping from a building without blocking mobile phone signals has been developed by a British defence contractor. The technology is designed to stop outsiders gaining access to a secure network by using Wi-Fi networks casually set up by workers at the office.
It is the work of moments for an employee to connect a paperback-sized Wi-Fi base station to a company network. That person can then wander around the office with their laptop while remaining wirelessly connected to the internet. But it is also the work of moments then for an outsider…
