MisterBill2
- Joined Jan 23, 2018
- 18,176
Indeed it is true, and so the military has created the "tempest" program to develop ways to prevent this giving away any information, or being susceptible to interference. There is a great deal of information on the topic and some of it is not classified and may be available.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?
AND, TEMPEST certified computer systems do not radiate any data related signals.