I asked a question on StackExchange about device to measure ELF of CPU and anything to mask the ELF of CPU. I asked this after I read a report detailing how researchers used electromagnetic activity of the CPU to exfiltrate data from an airgapped system in a Faraday shield. One user who answered the question said that almost all circuits are capable of acting as antennas, if this is true, then it must mean all motherboards, CPUs, GPUs are capable of transmitting and receiving data without being connected to a WiFi or Ethernet, anyone nearby could use this phenomena to compromise the system.
Is it true that all circuits can act antennas? Can IC found on CPUs, GPUs, motherboards, etc be programmed to act as antennas to send and receive data? Is there a way to find at what frequencies they are broadcasting and receiving? What can I do to mask the ELF of CPU and higher frequencies?
Is it true that all circuits can act antennas? Can IC found on CPUs, GPUs, motherboards, etc be programmed to act as antennas to send and receive data? Is there a way to find at what frequencies they are broadcasting and receiving? What can I do to mask the ELF of CPU and higher frequencies?