Posting in Cities
Researchers have developed a 'Wi-Fi' wallpaper that blocks its signals -- useful for your office or conference?
Digital security is currently a hot topic in the press. It's advised to secure your computer with necessary security patches and updates, install a firewall, and to use strong passwords and keep locks in place for mobile devices.
Wi-Fi technology is no exception. For the mainstream consumer market, protecting your Wi-Fi may not only save you an unexpected bill due to free Internet seekers if you're on a capped contract, but will prevent unknown freeloaders from accessing the network entirely and save you from a number of privacy and security issues.
Protecting the network through a strong password (and that means no qwerty12345 or password1, please) is currently the easiest and most effective method to keep household networks secure. But what if your wallpaper could do it for you?
Researchers at the French Grenoble Institut Polytechnique and the Centre Technique du Papier have developed such 'smart paper', and a Finnish materials company called Ahlstrom plans to manufacture a version of the paper that can be used to not only decorate homes and offices, but block Wi-Fi signals.
The wallpaper, currently in its prototype stage, is designed to trap and isolate Wi-Fi signals without interfering with radio signals or mobile phones. Using conductive ink that contains silver crystals, frequencies between the 2.45 and 5.5 GHz range become blocked -- preventing signals from entering locations beyond the paper.
Pierre Lemaitre-Auger, one of the researchers and developers of the paper said*:
"A wireless network is provided with protection that can be cracked by the crafty. If you put wallpaper on the walls around an office or apartment, your Wi-Fi works well but it can not be hacked."
The paper can be applied like normal wallpaper, and be placed on material including concrete and plaster. It may not be an interesting prospect for the general public -- when strong network passwords do just fine -- but for companies or areas that are sensitive to Wi-Fi interference, it may be worth the investment to redecorate.
It could be used in conference rooms, theaters and hospitals, or perhaps be installed in hotels to prevent guests from trying to access free Wi-Fi sources instead of paying for the service.
According to L'Informatcien, the researchers claim the price of the wallpaper would be "equivalent to a traditional mid-range wallpaper", and should be available commercially in 2013.
*Human translation from French.
Image credit: Grenoble Institut Polytechnique
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as windows, doors (and door jambs), flush mount ceiling fixtures and anything else that creates a break will leak RF. The amount of leakage will vary based on many factors including where the AP is in relation to the gap(s). I can detect WiFi with an omni hundreds of feet away but this could reduce that to tens of feet. My wife would probably want this stuff papered or painted over so they should design this stuff with that in mind. After all with all the variations in wallpaper there's no way that they could make this stuff with a wide enough appeal.