New air-gap jumper covertly transmits data in hard-drive sounds

[jmowreader]

7. Let's see if I have this right

If I were an Evil Secret Agent I could break into a secure office building, infect a computer with some specialized malware, install a microphone within six feet of it and pick off sensitive data at 4800 baud by listening to the Morse Code this malware makes the hard drive heads tap out (assuming, naturally, that the computer I'm trying to attack doesn't have solid state drives, which are immune to this exploit because they have no heads)...or I could pay a maintenance crew to attach an antenna to the outside of the building and pick off, from 200 to 300 meters distance and at the full speed of your computer, the signals flowing through the plastic case on your computer and emanating from those cheap-ass USB and Ethernet cables you bought from OfficeMax four or five years ago.