Anti-Wi-Fi paint

The University of Tokyo, has developed an interesting way to keep your Wi-Fi in your home, and away from neighbors that would like to "use" your signal without paying. In this article by the BBC World Service the new "Anti-Wi-Fi" paint is described as being able to block high frequency signals, keeping your sensitive data where it belongs. There are also indications that this paint could be used in theaters to keep your movie or play from being interrupted by ringing cell phones.
The reason this paint works to block high frequency signals (up to 100 GHz) is because it contains an aluminum-iron oxide that resonates at the same frequency as the Wi-Fi and other radio waves. This, in effect, absorbs and blocks the signal from going out and also keeps other signals from coming in. And the potential uses are limitless. Currently there is talk about using this formula to make new movie viewing screens and even clothing. The best part? It is not very expensive.

Now here is an invention I bet that Hugh Jackman wishes that the theater he was performing in recently had used this paint! A cell phone rang during the performance of the play and Jackman broke character and told the audience member to answer his phone. Ok, now that is an extreme reaction to a ringing cell phone, but you get my point. All of us have had a movie or sermon or speech interrupted by a cell phone. Stealing Wi-Fi is rampant too. Recently I noticed that there was a car paused outside of my house for a while and when I asked the man what he was doing he sheepishly told me that he had found signal and was using his computer, in the middle of my street! So annoying. Interestingly enough, the uses for this paint are not just limited to Wi-Fi signals and cell phones. There is also speculation that this paint could be used within hospitals to make the transference of information from one machine to a computer faster and more private as well. I will be interested to see where this all leads, and if it will become available to regular people like you and me.