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Message: <blockquote data-quote="ac2000" data-source="post: 5634729" data-attributes="member: 132852">Don't like the idea of your neighbours rudely snooping on the wireless signal you  slaved to pay for from the lazy comfort of their living room? It's not just  about slowing down your connection; while they're downloading Mad Men  via bittorrent, you could be on the hook for their actions. Wireless security and encryption systems are fraught with problems and  insecurity, and other methods to restrict your signal to a small area are  cumbersome at best. Enter a new solution: Anti-Wi-Fi paint. <img src="http://newsimg.bbc.co.uk/media/images/46460000/jpg/_46460605_manpainting_266282.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The idea is simple: Use a special paint on walls where you don't want  wireless to pass through (say the exterior of your house). The secret is mixing  aluminum-iron oxide particles in with the paint. The metal particles resonate at  the same frequency as Wi-Fi and other radio waves, so signals can't pass through  the thin layer of pigment. Outsiders would simply be unable to access your  wireless network, just as you, inside the house, won't be able to interlope on  anything beamed on the outside. Developed by the University of Tokyo, the paint is said to be the first that  can block radio frequency in higher spectra where Wi-Fi and other  higher-bandwidth communications occur rather than just low-frequency wireless  like FM radio. Most Wi-Fi technologies operate at 2.4GHz; the Tokyo paint can  reportedly block frequencies all the way up to 100GHz, with a 200GHz-blocking  paint now in the works. The paint isn't just of interest to those concerned about wireless leaking  out of the building. Movie theaters have long been interested in finding a legal  way to keep cell phones silent during screenings. Electronic jammers that  actively block wireless signals are illegal, but passive materials that prevent  wireless signals from getting through are not. Since the wireless-blocking paint  can also block the lower-frequency signals that cell phones use, addled mobile  junkies would have no outlet for reaching the outside world. Some aren't convinced that anti-Wi-Fi paint makes a lot of sense for a secure  situation, though. Says one engineer, "Surely the thought of having to  redecorate a building in order to provide Wi-Fi security is more costly and  complex than the security functionality available in even the cheapest of Wi-Fi  access points..." Source - <a href="http://ca.tech.yahoo.com/computers/accessories/article/3904" target="_blank">http://ca.tech.yahoo.com/computers/accessories/article/3904</a>More Info - <a href="http://news.bbc.co.uk/2/hi/technology/8279549.stm" target="_blank">http://news.bbc.co.uk/2/hi/technology/8279549.stm</a></blockquote>

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