00:00The ghost bug that went undetected for seven years, with no battery, no wires, a listening
00:04device that stole state secrets for seven years straight. It was built with the involvement of
00:09inventor Leon Theremin and concealed inside a wooden plaque, gifted from the Soviet Union
00:13to the U.S. ambassador, just 19 centimeters across and weighing a mere 31 grams, yet it
00:18could be remotely activated by a microwave beam transmitted from outside. Sound waves
00:22from nearby conversations caused a metal membrane inside to vibrate, encoding the audio onto the
00:26reflected radio waves and transmitting it back. Because it had no active components, it was
00:31completely invisible to every detection device of the era, a near-perfect instrument of espionage.
00:36Interestingly, a variation of this technology is now used in some transit cards. Inside,
00:40you'll find a leaf-shaped antenna coiled within, along with a single, remarkably tiny IC chip.
コメント