http://news.cnet.com/8301-1009_3-10200631-83.html By Elinor Mills Security CNet News March 19, 2008 VANCOUVER, B.C. -- Presenters at the CanSecWest security conference detailed on Thursday how they can sniff data by analyzing keystroke vibrations using a laser trained on a shiny laptop or through electrical signals coming from a PC connected to a PS/2 keyboard and plugged into a socket. Using equipment costing about $80, researchers from Inverse Path were able to point a laser on the reflective surface of a laptop between 50 feet and 100 feet away and determine what letters were typed. Chief Security Engineer Andrea Barisani and hardware hacker Daniele Bianco used a handmade laser microphone device and a photo diode to measure the vibrations, software for analyzing the spectrograms of frequencies from different keystrokes, as well as technology to apply the data to a dictionary to try to guess the words. They used a technique called dynamic time warping that's typically used for speech recognition applications, to measure the similarity of signals. Line-of-sight on the laptop is needed, but it works through a glass window, they said. Using an infrared laser would prevent a victim from knowing they were being spied on. The only real way to mitigate against this type of spying would be to change your typing position and mistype words, Barisani said. [...] _______________________________________________ Best Selling Security Books and More! http://www.shopinfosecnews.org/Received on Fri Mar 20 2009 - 01:14:26 PDT
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