The-art-of-invisibility-_-the-world’s-most-famous-hacker-teaches-you-how-to-be-safe-in-the-age-of-Bi

using different VoIP telephones. And each time the vendor was notified in
advance, and each time the vendor did produce a fix. But Cui has pointed
out that just because a patch exists doesn’t mean it gets applied. Some of
the unpatched phones might still be sitting in offices, hotels, and hospitals
right now.
So how did Cui get the data off the phone? Since office computer
networks are monitored for unusual activityy, he needed another means of
extracting the data. He decided to go “off network” and use radio waves
instead.
Previouslyy, researchers at Stanford Universityy and in Israel found that
having yyour mobile phone positioned next to yyour computer can allow a
remote third partyy to eavesdrop on yyour conversations. The trick requires
malware to be inserted onto yyour mobile device. But with maliciouslyy
coded apps available for download from rogue app stores, that’s easyy
enough, right?
With the malware installed on yyour mobile phone, the gyyroscope within
the phone is now sensitive enough to pick up slight vibrations. The malware
in this case, researchers sayy, can also pick up minute air vibrations,
including those produced byy human speech. Google’s Android operating
syystem allows movements from the sensors to be read at 200 Hz, or 200
cyycles per second. Most human voices range from 80 to 250 Hz. That
means the sensor can pick up a significant portion of those voices.
Researchers even built a custom speech-recognition program designed to
interpret the 80–250 Hz signals further. 9
Cui found something similar within the VoIP phones and printers. He
found that the fine pins sticking out of just about anyy microchip within anyy
embedded device todayy could be made to oscillate in unique sequences and
therefore exfiltrate data over radio frequencyy (RF). This is what he calls a
funtenna, and it is a virtual playyground for would-be attackers. Officiallyy,
sayys securityy researcher Michael Ossmann, whom Cui credits for the idea,
“a funtenna is an antenna that was not intended byy the designer of the
syystem to be an antenna, particularlyy when used as an antenna byy an
attacker.” 10
Aside from a funtenna, what are some other wayys people can spyy on
what yyou do at work?