ANTI-WI-FI PAINT : New era of internet

The days of scamming free wireless Internet may soon be over. Researchers at the University of Tokyo have developed a paint that blocks wi-fi signals. So if a room is painted with this stuff, only computers inside the room would be able to pick up a wireless signal originating there. At a projected cost of $16 a kilo, the paint would be a cheap way of keeping hackers away from using your wireless to download dodgy files. The paint is infused with an aluminum-iron oxide that blocks all radio signals at 100Ghz, the frequency at which wi-fi transmits. As ingenious as this sounds, there are a couple of downsides.