Do you feel safe against PowerHammer ?
OK, the data transfer rate of the leak method are very low actually – but sometimes only some bits contain the relevant information the spy is seeking for, isn’t it ? They also have a hack to transmit information by the optical way (hard disk LED)…
Following PDF-Links describe the impressive work of the authors in detail; Mordechai Guri, Boris Zadov, Eran Atias,Yuval Elovici [Ben-Gurion University of the Negev – Cyber Security Research Center]
Exfiltrating Data from Air-Gapped
Computers through Power Lines”
Leaking (a lot of) Data from Air-Gapped Computers via the (small) Hard Drive LED”