A trusted third party published this little article today:

http://zaufanatrzeciastrona.pl/post/badacz-twierdzi-ze-wirus-komunikuje-sie-przez-karte-dzwiekowa/

Hmm… points 1 and 2 sound somehow familiar. A few years ago, during a training, I described these methods; some people considered them fantasy back then.

DNS tunneling and ICMP tunneling have existed for years. I wonder when we will see data transmission through changes in a computer’s power consumption.

By the way, speakers are not required to generate sound ;-), but perhaps that is a topic for another time…