A group of French researchers have developed a new kind of wallpaper that blocks Wi-Fi signals and only Wi-Fi signals. The silver crystals on the paper are arranged in a particular way that stops Wi-Fi but won’t stop your cell phone or your remote controls.
If you plaster it in your home, it will keep your pesky neighbours from stealing your Wi-Fi.
Then again, you can always just set the password on your wireless router but that’s so conventional.
Ars Technica has all the tech details.