Two new techniques to spy on computer users have been revealed these days by two independent scientific studies conducted at the University of California, Santa Barbara, and at Saarland University in Saarbrucken, Germany. The researchers in California developed an algorithm that can estimate what a computer is writing by watching the hands move. The algorithm is far from perfect and has a success rate of 40% which is enough to understand the meaning of the text that is written.
Words are chosen by probability and suggest alternatives which more often than not make more sense than the first word. This introduces a new technique to spy on users without having to actually access the computer at all, all that is needed is a good view of the hands and the measure of the keyboard.
The second spy tech could come right out of the latest James Bond movie. The researchers at Saarland University managed to write a computer algorithm that is capable of interpreting reflections of the computer screen on objects. The quality of the telescope plays an important role, a normal $500 telescope was able to read 12 point fonts of a reflection that was 5 meters away from the computer and 198 point fonts from a distance of ten meters.
A more powerful Dobson telescope for $27500 was able to yield the same results from a maximum distance of 30 meters. Other tests allowed the researchers to view the monitor from a white wall that was 2 meters away from the computer screen.
The best way to defeat the techniques ? Don’t access a computer in public, always close the curtains when working with your computer and make sure no cameras are installed in the room with a computer.
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My opinion: if someone who has cash for 27500$ telescope is interested in your computer – closing curtains is so not going to help. :)
Military is using kinda tents that block optical and EM spying (don’t know about sound) but I doubt you can just go and buy it.
And avoid voice recognition without intimacy !
Best way to beat the technique?
Live in a bunker without windows, with autolock… *Put pictures of my office here*
you forgot to mention the lead walls. Oh yeah, I just discovered why your wireless connection is not working ;)
Shall we start building separate solid shelters to achieve better privacy when working on our computer? Might be the case soon :D
hello