Slashdot Mirror
Anti-Wi-Fi Wallpaper
Alephcat writes "New Scientist is reporting on a wallpaper that can prevent hackers accessing secure networks via Wi-Fi - without blocking mobile phone signals - that's been developed by a British defence contractor. It is based on covert 'stealth' technology that was originally designed to hide military radars."
"Heathrow Tower, we can see London, but RADAR says it doesn't exist, then this weird music starts playing and this guy gets up from his seat with a big book and says we've entered some twilight thingie!"
A feeling of having made the same mistake before: Deja Foobar
what's to stop me from establishing a VPN connection over my GPRS cell? Either way, they can't win.
Didn't we already have this a month or so back?
I have the oddest feeling of Deja Vu. Haven't we seen this story before? Like two weeks ago?
Javascript + Nintendo DSi = DSiCade
Does it come in 1280x1024?
http://sflip.com
... For an endless barrage of "tin-foil" jokes.
Well i guess tinfoil hats are about to be replaced. as an additional bonus, it is now easier to shield your entire body from "the man"!
Or on the ceiling? (Think multi-story apartment complex) Carpet?
Get real... the people who want security in the first place WON'T USE WIFI.
It'll never make it to market.
a wallpaper that can prevent hackers accessing secure networks via Wi-Fi - without blocking mobile phone signals
But... I want it to block cell phones as well.
And lining the whole house in foil just looks way too shiney for normal use...
Can they make wallpaper that enhances my wifi instead of killing it?
"Derp de derp."
Heh... I see an army of wallpapered tanks crossing the battlefield. :-)
Cwm, fjord-bank glyphs vext quiz
Did you even read the blurb?
RTFA.
"New Scientist is reporting on a wallpaper that can prevent hackers accessing secure networks via Wi-Fi - without blocking mobile phone signals."
I don't really see this stopping hackers that are determined. I use my own cell phone as a modem to transfer data all the time. Since it lets celluar signals through, it would be very easy to just connect to the net like this.
This signature was left intentionally blank.
Yeah, I thought they meant software wallpaper... like a JPG covering my desktop. "How the hell would THAT work?" I wondered. Feeling silly now.
RP
Kind of neat, but I worry about the fragility of the wallpaper in any kind of commercial or industrial setting. It seems to me such a material would be far more useful incorporated in a vapor barrier *inside* the wall. I know it would be an expensive retrofit that way, but how else would you deal with drop ceilings and the masses of ducting and cabling therein?
Now I can trade in my itchy/uncomfortable tin foil hat, with a paper one! Now I will be the cool one wearing a crown-like the ones from Burger King!
Sig it.
tough luck pal. we all make the same mistake occasionaly. heck, just look at where the gnaa placed this time ;)
What if you don't use wifi, but also want to ensure that no one in your office can attach to a rogue AP?
I'm sure there are a number of uses for this which have little to do with securing one's own wireless LAN.
Raptor
"Procrastination is great. It gives me a lot more time to do things that I'm never going to do."
Where can we find the downloadable version ? ;-)
I'm sorry, the number you have dialed is an imaginary number. Please rotate your phone 90 degrees and dial again.
Uninformed people want security, too, they just don't know it until they've been violated or 0wn3d. One former CIO thought WI-FI was extremely cool until I started showing him the stuff about War-Chalking on Slashdot. Funny reaction, though, seemed I was part of some problem by revealing such things. Must be the PHB self-defense mechanism kicking in... 'didn't make mistake, peon warning of possible security holes is actualy problem, move peon to desk further away, problem solved.'
A feeling of having made the same mistake before: Deja Foobar
Was it in the first Omen movie where the guy had a room that was papered with pages from the Bible in order to keep Satan out?
You are in error. No-one is screaming. Thank you for your cooperation.
this wood panelling would also do the trick...s 99992461
www.newscientist.com/news/news.jsp?id=n
plus wood is so much more stylish than wallpaper
Something to replace the tinfoil in my hat!
That's right, I read at +2 and post at +1. Not even I care what I have to say.
I am selfish, if I pay for my net access, no war driver is allowed on. Right now I am just trying to be harder to get in then my neibores.
But still - it would have to be in a windowless, carpetless, fully wallpapered room... might as well be a strong room instead.
WIFE: "What do you mean we need it to prevent the hacker children next door from getting our credit card numbers?"
HUSBAND: "I know, honey -- it sounds bad, but think of all the information we have flying through the house and out the walls because we don't have this anti-wifi wallpaper in every room."
WIFE: "What information? You mean three to four hours every Friday and Saturday night of video game data? Are you scared the hacker children next door will get your serial number? Are you scared that THEY too will learn of your porn like I did last week? Christ -- they're 12!"
HUSBAND: "Hey -- the black hats start early these days, babe. Porn? What porn?"
WIFE: "Never mind. What's a black hat? What are you friggin' talking about? Enough -- stop bothering me with this tin foil looking wallpaper and help me pick out a nursery paint color."
HUSBAND: "Are you sure you want paint in the nursery, babe? What if someone hacks our wifi baby monitoring camera because we don't have this wallpaper and decides to kidnap our child?"
WIFE: "You sad little nerdy man. Shut up and pick out a paint color."
HUSBAND: "But -- what about our credit card num---"
WIFE: [SLAP!]
HUSBAND: "Yes dear -- I like Nemo Yellow."
HUSBAND: [SIGH]
IronChefMorimoto
Check out this previous story: http://ask.slashdot.org/article.pl?sid=04/08/04/18 54238&tid=193&tid=4&tid=218
SourceHosting.net, LLC
Ready. Set. Code.
http://www.sourcehosting.net/
But it is also the work of moments then for an outsider to breach that company's computer security using the Wi-Fi connection. Unless the Wi-Fi base station is protected by security measures that most amateur users would not bother to set up, it gives anyone up to 100 metres away the chance to bypass the corporate firewall and wirelessly hack straight into the network.
...
Yeah, cuz most amateur users are going to install special wallpaper
I understand that some compaines may want this, and it is a cool idea, but if you are going to use Wi-Fi you have better do your best to secure it, not just pray you can keep everyone out with some wall paper.
man
No manual entry for
Well, I better go and line my TFH with some Anti-Wi-Fi wallpaper.
An Indian-American Hindu committed to non-violent thought/speech/action alarmed by the global explosion of radical Islam
Although it's illegal. In addition to the wall jammers, there are handheld devices and even alarms that can be set up at a building entrance if someone tries to walk in with a cell phone turned on.
... an encore from this article?
FLR
So we can take our wireless network and limit it to a single room? Then why not use a wire? Unless we only wallpaper the walls on the outside of the house, which is rediculous
I live in a faraday cage, but my wife let's me out to take out the trash.
It's called a password. Also works well with 128-bit encryption found in 802.11g lately. I wonder what encryption method this wallpaper uses...
'Yes, firefox is indeed greater than women. Can women block pops up for you? No. Can Firefox show you naked women? Yes.'
If he had, he would have seen;
that rogue APs are a concern (Strike 1),
that they are working on transparent window treatments (Strike 2), and
that they have considered market pricing (Strike 3).
I know that WEP isn't the most perfect solution there is, but it seems to me that it'll be more practical than redecorating the office/home.
OK, WEP can be hacked, but it really depends on the amount of traffic there is and the length of the key in question, and to be honest, if you'd really like to be secure you shouldn't use wireless anyway.
Wireless is convenient, and looks clean. That's why it is such a (moderate) success. Anyone with a laptop agrees that dragging around 100ft of cable from the room with the ethernet plug to the living room looks rather silly. A wireless network is much easier, and avoids having a spouse muttering underneath her breath or children tripping over the cable (and possibly janking a valueble piece of laptop from your lap).
Buying wifi-proof wallpaper just seems so over the top, even for government agencies, but everyone knows they just want to spend your hard earned taxes on something completely useless (there, I've said it, and I've been waiting to say that ever since I mailed my taxforms).
Where does the energy from the "blocked" WiFi RF radiation go? Can the shield "ground" out to a storage cell? Sure, its a tiny amount of power. But if the WiFi transmitter can be engineered to consume just a little more power than it transmits, the recovered "signal" power could feed a battery supplying the transmitter, and multiply the lifespan of a single charge by many times. That could be the key to deploying WiFi off *any* grid of wires, either network *or* power.
--
make install -not war
I don't see any reason you couldn't paint over the wallpaper. Seems like the more appropriate way to do it, to me.
tasks(723) drafts(105) languages(484) examples(29106)
Who cares if they can attach to a neighboring access point? It's not your bandwidth. Don't be such an asshole.
If a company's *really* that concerned about people gaining access to their network through tapping, then they should be moving away from wireless altogether and towards fiber optics. Fiber is completely impervious to electromagnetic tapping, because it's optical, not electrical.
WiFi will never be secure. So decide if you want security or convenience.
Ruby on Rails Screencast
Instead of remodeling a room - just place some of these lights, which use the same spectrum, around the perimeter.
4 6&tid=126
"low-power light blubs which causes interferences with Wifi signals"
http://slashdot.org/article.pl?sid=02/06/13/03342
This will make a nice companion to my anti-wallpaper wi-fi invention. *bzzaap!*
Yes, the greatest battle since Freddy vs Jason! (please see the recent photoshop contest at Fark.com for others)
This kind of reminds me of this computer, which used what was called Tempest sheilding to stop people from picking up EMPs from the computer. They used it as wall paper too.
"You sir, have just crossed my happy line..."
Don't plan on using this stuff any time soon to block people from sitting outside your house and downloading porn - unless you want to spend £500 UKP (about $1000 USD) per square metre to coat your front wall.
Two questions.
Why put Wi-Fi on a secure network?
Where is there really a secure network connected to the Internet?
WhatMeWorry!
was originally designed to hide military radars
How can you hide a radar? It needs to transmit enough power in it's area of interest to cause a strong enough reflection to detect. Putting an RF shield around it would be pointless surly?
my first thought was why they were so worried about letting cell phones through... after all, if you're worried about security, don't let any radio waves through. Like these guys.
Then it hit me. Suits use cell phones, not wi-fi. Wi-fi = evil hacker tool. Cell phone = required hardware, since if I cant talk constantly I might have to think.
A Human Right
I thought the maths for this were well known?
...Also, would it not be easier to block all frequencies with a conventional faraday cage and use a mobile repeater to allow outgoing calls?
It's like the way computer case air holes are designed to be big enough to let the air through, but still stop rf as the wavelength is longer than the hole diameter.
Either that, or it's a tank circuit.. capacitive coupling between the two copper grids could be tuned to a specific frequency.. I wonder if there is any other LC circuitry..
Why would using diodes and passing a current across them cause all freqs to be blocked?
Random thoughts.
Wouldn't it be easier and less expensive to:
Come play Moral Decay!
...they'll beam a wifi and a cellphone signal at a building and measure the reflections. If the building is much more reflective at wifi frequencies than cellphone frequencies, they've found something really worth finding. How they get it once they've found it is another matter, of course.
"How to Do Nothing," kids activities, back in print!
Seems Hershey, of chocolate fame, pioneered the windowless office. Not that many people have anything good to say about getting a corner office without a window...
A feeling of having made the same mistake before: Deja Foobar
I'm having a hard time reconciling the phrase "secure network" with "casually set up by workers". If its actually a "secure" network, wouldn't that mean that nobody is doing anything with wireless, much less casually?
Replace tinfoil hat with new wallpaper. : 34,109
D'oh! I thought they meant Windows desktop! D'oh! I'm a friggin' idiot! D'oh! : 14,951
"Firewallpaper" : 12,520
Capture the RF energy into a capacitatory dongle and have perpetual motion! Ha ha HAAAA! Global domination! : 1954
This is a repost! Death to the reposters! Die! Die! Die! Arrrgghhhh! (gurgle) : 675
In Soviet Russia, wall papers you! : -1
--- Ban humanity.
News.com.com link c/o your local /. lurker
How to stop people from connecting an AP. First off dissalow any remote switches particualy dumb ones. Only allow one MAC address per port. Turn the port off if you see spanning tree. Run 802.1x auth and vlan selection with a 2 factor login (secure ID etc). Only allow one login per person. Not that hard to do with modern Cisco gear, expensive but not hard.
No sir I dont like it.
Not sure if you are aware, but WiFi is used for other applications than Internet access. Companies use it in inventory control applications in stores and warehouses and all kinds of places. I think they would be very interested to know they could prevent someone from setting with a laptop snooping what's going on with their inventory.
Hospitals and doctors offices would be especially interested to help keep their information inside their walls and further comply with regulations.
They would likely make more money selling to organizations like that anyway than selling to individuals.
Jumpstart the tartan drive.
Pink Panther insulation is foil backed. It might do the trick and be out of sight.
This appeared months ago!
Slow news day?
You aren't remembered for doing what is expected of you
"The wall covering can be mass produced at relatively low cost. A square metre will cost about £500: peanuts to big business."
... great, now the same company that took away half my lighting when .COM crashed for financial reasons now has an excuse to make our cubes all smaller for security reasons (how many engineers can be fit into 1m^3 -- no, really, I doubt my employer can even afford this much real estate @ £500/m^2 ... ) ... (-;
and spelling, I'm certain that they would walk away from your wi-fi, shrouded in a cloud of confusion.
How do you get a british name like O'Connor without the ability to speak and write proper english? Did your grandfather marry a slave?
Brilliant!
...and they can save half the money they spent (not because the idea is expensive but because I'm greedy). Simply fire ANYONE on the spot who connects an unauthorized wireless hub to the corporate network. No questions asked, no ifs, ands, or buts about it. Show the employee, err...ex-employee, the door and make sure to have him escorted by no less that four security guards. Make him look foolish for his transgressions and make sure others see his shame. This idea works for opening e-mail attachments without verifying the source and giving out passwords to unauthorized people amongst other problems with security.
If you're using this to keep wireless data inside (and not pervent transmission altogether), doesn't it seem like this would defeat any chance at room to room wifi access? I mean, it's hard enough to get good signal strenth in buildings without having some futuristic alien-technology inspired government stealth ultra-anti-signal wallpaper in the place.
We are one consciousness experiencing itself subjectively. Back to you with the weather, Bob!
That damn paint-and-wallpaper trade group is just trying to scare everyone so they can unload a warehouse full of surplus foil wallpaper that went out of style in the 70's
Beauty is in the eye of the beerholder.
Wallpaper? Data secrecy? Is there no Martha Stewart joke to be had here? C'mon, people!
--- Ban humanity.
Does this mean that those space nuts will not have to wear tinfoil hats to keep the aliens out of their minds?
Blackrobe "The Original TechnoWeenie!"
This is really cool technology, and pretty simple, too.
If you have the version with Diodes, it blocks 2.4, 5 and 6 frequencies by default.
If you run a current trough the diodes, it'll work like a sheet of copper and block pretty much everything.
But it will have to come down in price before I coat my house with it, it's more than $100 per square foot.
get 7 free Japanese lessons.
it's not so bad with Firefox - doubleclick to select link text, middle click to go to Google's best guess (which is the actual site)
tiny strips of wire/foil at various lengths glued to the back of the wallpaper at various angles would have a similar effect to chaff.
meh
Here's a hint: If you see a huge white geodesic dome on top of a 200-foot tower, somebody is probably "hiding" a radar in it.
How dumb do they think we are? Are we all supposed to think that's just a big postmodern playhouse up there?
Set up my wireless access point as a deliberatelly unprotected box and watched packets fly by my router... Seems one of my neighbors was quite into high-bandwidth images and videos - guess he had a script or something to make downloading faster. Pretty effective denial of service attack on the WiFi access point.
I have aluminum siding, you insensitive clod!
I want to delete my account but Slashdot doesn't allow it.
It's not really wallpaper, it's a thin sheet of Kapton (1/10th of a millimeter). You can see trough that, so you can paste it on windows, and you can also put it under the carpet and in the crawl space above you.
:)
But I think you are right, people who want security won't use Computers
get 7 free Japanese lessons.
Try a WiFi attack droid, like the one @ defcon. Check it out here: http://www.engadget.com/entry/7166397862995041/
-- [H]itman_forhire
That would be great, and I'd want to have a shopping bag made of it. No tracing of my movements through the store!
Or think of those poor school kids in Japan, they could protect themselves with this from "big blothel", too.
Why not just secure the network rather then hacking security as an afterthought?
This is a nice option, it is a good idea to make sure your installation is that little bit 'extra clean'.
Don't forget there will still be holes. Roof, floor, ventilation. Then any repaired walls or windows will need this treatment. I know many places would love the opportunity to save a few dollars on the next broken window.
BAE is now working on a transparent, ultra-thin version for windows.
HA. The only wallpaper I know of that protects Windows is 1024x768 and says "Gentoo" all over it...
Brought to you by the makers of the tin-foil hat and the ionic bracelet...
- Have you ever noticed that the more you learn about technology, the more stupid you sound trying to explain it?
Or you could install this extension (latest version here) and just click the link. ;)
We use a plastic vapor barier in home construction called HouseWrap. While wapp paper seems like a PITA since you need to do floors and ceilings if they made housewrap that could do vapor barier and be the wi-fi shield I'd toss it on my place. The ability to hit a wall switch and block cell phones would also be an advantage for say a dinner party where there is one moron who wants to talk on the phone all the time.
Get real... the people who want security in the first place WON'T USE WIFI.
No - people who want real security will use secure protocols over WiFi. I want security, and as such I run IPSEC over my WEP encrypted 802.11g network.
Of course a bit of driving around Southampton (UK) shows that there are a hell of a lot of insecure networks and a worrying number where the access points are left in their factory default configuration.
People who don't understand security should not be allowed to set up any publically accessible networks (publically accessible == internet facing or wireless). Like it or not, security does (and probably always will) involve a clue and no amount of whinging by the unwashed masses is going to change that. And why should it - you don't expect someone with absolutely no idea about cars to be able to rebuild their car engine do you?
http://blog.nexusuk.org
I could see this technology used as a precautionary measure in ultra-secure facilities, but using this to secure Wi-Fi is a horrible example. The cost to cover a 2500 square foot office with this material would be about $500,000 US.
I myself would buy a good VPN concentrator for a few thousand dollars, put any wireless access points on their own network and have a simple network ACL that only allows connections to your VPN concentrator. Simple, secure, encrypted, easy to manage, and no one gets in without credentials. Oh, and save yourself about $497,000.
The tech behind that wall paper sounds like the same as selective interference used on camera lens anti-reflection coating.
In this case the spacing of the 2 reflective layer is tuned to allow maxium transmission of GSM and 3G signal; the reflection wave from first copper layer is 180^ out of phase with the reflection wave from the second copper layer.
IMO this wallpaper will block EVERYTHING and just allows the mobile channels to go through.
A real world example of a reasonable use: We have no less than 5 visible access points at certain locations, each from different companies, each on varying frequencies, usually somewhere smack in the middle interferring with 1/6/11.
Being able to wallpaper the outter walls, means the difference between a poor signal with pingponging speeds and an excellent signal. Talking with the other companies doesn't help, heck the hospital next door (with 2 wireless links to a remote location on channels 2 and 3 no less), refused to understand when we spelled out to them why they were getting lossy signals and were walking on us.
Give me reasonable pricing on this wallpaper in an acceptable blah color, and I'd buy rolls tomorrow.
Aluminium foil...
My Karma is so low that even my own postings are beyond my current threshold
next thing you know, people will demand a voice command interface because they can't be bothered to move a mouse around and press its buttons...
Just great -_-
I could not help but thinking about an old story on that had somthing very much the same.
also known in some circles as "chicken wire".
Maybe I'm the only one who ran across http://www.evilscheme.org/defcon/ this little gem , but this seems like a very good low-budget option for striking back at your friendly neighborhood wi-fi swipers.
anything i tell you will cloud your opinion.
All this waiting just for a wallpaper?
I leave WEP and everything off, and keep it in a DMZ on my local network. My router then records all packets not coming from one of the MAC addresses of my machines. Free WiFi, but I get to peek :)
My Other Computer Is A Data General Nova III.
Or better yet, secure your WI-FI.
Get one of the D-Link Super G with the Atheros Chipset. Those use a different encryption protocol which is properly secure. An added bonus gives you up to 108 mbps in super G mode (overhead and such will make the real throughput less). I've gotten roughly 80-85mbps sustained with mine at home, after all the overhead.
Turn off SSID broadcast and manually set up your laptop/wireless device with the hard to guess SSID you chose. It's not that hard people, yet I drive around with my Dlink card or even go into stores with my Itronix service laptop and I can hear netstumbler bonging away with unsecure or poorly secured access points.
No, not Billy G's love child. I mean the glass things that form most of the outside wall of the buildings I'm looking at. Wallpaper isn't terribly functional when there isn't a wall to put it on.
I am Homer of Borg. Prepare to be -- Mmmmm! Doughnuts!
"Hershey, of chocolate fame, pioneered the windowless office. Not that many people have anything good to say about getting a corner office without a window.."
That depends.
How much chocolate would I get?
much more sophisticated. A microwave door is easy to make, just make the metal grid small enough. But that wallpaper is a band-stop filter, i.e. it resonates at a well defined frequency and consumes the energy radiated from the transmitter, while passing other frequencies nearly undisturbed. Though, I wonder why they make such a big secret out of it. Printed microwave circuits have been around since ages, in fact I learned some of the basics as an EE student. Every RFID tag does the same. So what's the news here?
I'd like to see this anti-Wifi wallpaper featured on "Queer Eye."
Just don't mention Project Greenglow (anti-gravity drives etc.).
My web domain.
But on this new wallpaper, do the Snozzberries taste like Snozzberries?
worst sig ever. . .
Repost:
0 41 9218&tid=193&tid=126
http://it.slashdot.org/article.pl?sid=04/06/20/
Man, I was wondering what I was going to do with the 5000 gallons of lead-based paint I have.... Introducing... WiFi Blocking PAINT!!!!
All in all it seems like a dumb idea. The only way I can see it being used is in *addition* to strong conventional wi-fi security measures. Unless I'm missing something?
WWJD? JWRTFA!
This anti-WiFi wall paper is grossly overpriced. The same effect can be achieved using EMSEC's paint at a cost of about $3 per square foot (about $500 per gallon) or using ASTIC Signals Defense's SD1000, SD2000, or SD3000 series window films (about $15 to $30 per square feet installed; substantially more for the bullet proof glass version installed at US Embassies).
See http://www.worldtechex.com/WorldTech/Browsing/frmC ategory.aspx?type=TECHNOLOGY&id=59&report-id=5 for more information about the ASTIC film.
Both products block most RF frequencies, including the WiFi frequencies. The window film also blocks infrared threats(e.g. laser microphones) and UV threats (see the cambridge whitepaper on CRT threats).
The paint essentially includes certain powdered metals, including copper, that block RF frequencies. The window film takes a blast-resistant film and uses a patented plasma sputtering process to place a thin layer of gold, silver, and other metals on the window film.
The film is currently installed on a variety of buildings dealing with defense, homeland security, and intelligence in the Washington DC area. The EMSEC paint is State-Department controlled and requires a license for export. The ASTIC film can be exported to any country except those on the terror / bad company list.
Better have those covered up with that special wallpaper as well.
wallpaper that can prevent hackers accessing secure networks via Wi-Fi
If its secure, why the wallpaper?
Dvorak on Doomtech
Step four would be "Packet sniff for incriminating/embarrasing activity"
"I'm not impatient. I just hate waiting." - My Dad
Ah, the old "Let the employees do whatever the hell they want with company gear" argument. I'm sure that's quite secure.
Raptor
"Procrastination is great. It gives me a lot more time to do things that I'm never going to do."
What if you're next door to me, and I run a company where I can't rely on merely trusting my employees? What if you're not the one next to me, but some jackass running an open AP?
What if one of my employees is a jackass with a wifi card, a laptop, and a load of company data? Next thing you know, he's on the neighbor's wifi, and getting hacked wide open.
It's not about protecting my LAN, it's about protecting my data without filling the case with cement and burying the system at the bottom of the sea.
Raptor
"Procrastination is great. It gives me a lot more time to do things that I'm never going to do."
I don't need no stinkin wall paper! I need a real wi-fi encryption standard!
come on folks, 256 bit AES + diffie-helman key exchange or RSA public keys. The technology has been around so that all the relevant patents have expired.
What is your favorite reason for explaining why this hasn't been implemented yet?
(1) laziness
(2) Government conspiracy?
Your only allowing corprate laptops on the net right? And all corp laptops dont have wifi or bluetooth right? It's not that hard to have IT remove them. No cards means nomatter what your neighbors AP is setup as your fine.
I'm only talking about normal corp security if you have anything that needs to be secure (military bits, state secrets and the like) you need to put the computers in a cage to stop all the RF period.
No sir I dont like it.
There must be (a possibly bigger) market in blocking mobile phones? Make the tuned circuits resonate at lower frequencies (larger) and block mobile phones. Its so obvious as a legal way to enforce 'quiet zones' in so many places. Modern mobile phones are at 800, 900, 1800 and 1900MHz. Larger elements and the added bonus mobile phones are close to harmonic intervals makes for a simplified design.
There is quite a bit of information (in books, not http) how to do this. Is about as 'hi-tech' as anti-theft tags on CDs. At five or ten bucks a m^2 there would definitely be a market for a variety of purposes, and frequencies, including wlan. This beats the hell out of active jamming. Except for perhaps the US, this is definitely NOT patentable.
i wouldn't trust it, i have one simple solution to this problem: just use a wire!
who is gonna buy that wallpaper except maybe government offices, plus if your gonna use that wallpaper to coat one room, you might as well just use a wire
Ever seen those programs that make your CRT broadcast AM radio? That's what first came to mind when I saw this headline.
I always knew that my desktop picture of a Mayan spritual artifact was keeping big bad hackers away.
Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
Poo, when I first saw the title, I thought they were talking about something along the lines of this! (If you can transmit a MP3 with a screen image, surely you can jam a Wi-Fi!) };-)
The U.S. really needs an English to Wisdom dictionary.