(from their press release)The German security and film technology specialist HAVERKAMP gets ready for electronic bugging and eavesdropping as well as attacks involving harmful electromagnetic radiation...
As Ulrich Haverkamp, director of HAVERKAMP, stresses, "We know all too well the risks that are associated with wireless and open forms of communication which government institutions and companies are exposed to every day." It is important to bear something in mind: Almost all electronic devices transmit RF signals, as this is either their quintessential function, e.g. mobile phones or wireless microphones - or as technically unavoidable side effect, e.g. computer monitors or hard drives.
Regardless of whether the message is encrypted or not, a broad ‘open' path is made available, upon which information can easily escape from the building and land in the hands of competitors and eavesdroppers. (more)
Can this possibly work?
Think about it...
Do radio waves only travel through windows?
Does "reduced" signal leakage prevent interception?
What are the attenuation measurements?
Perhaps this would be effective if it were presented as part of a larger architectural shielding effort.
In my opinion, the inventors worked hard and developed a clever and potentially useful product. But, to promote a window film as a simple paste-on eavesdropping solution is neither credible, nor honest. If anything, this is one small part of a holistic solution.
Before you go down this road, call me for a map.
Prior art: see The Emperor's New Shades.
P.S. Yes, I know. The press release photo seems to show a parabolic microphone - an acoustic, not RF, method of eavesdropping. This does not make sense technically vis-à-vis the product, or to portray a viable eavesdropping attack.
