What's interesting about the wallpaper is the ability to block some frequency bands while passing others. There's been good shielding wallpaper available for ~15 years, but that's for blocking everything including cellphones and pagers.
At 12:20 PM 8/9/2004, Sunder wrote:
http://www.newscientist.com/news/print.jsp?id=ns99996240 or http://www.newscientist.com/news/news.jsp?id=ns99996240&lpos=home3
Stealth wallpaper keeps company secrets safe
10:00 08 August 04
Special Report from New Scientist Print Edition. Subscribe and get 4 free issues.
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.
