What is the primary focus of TEMPEST countermeasures?

TEMPEST countermeasures primarily focus on mitigating electromagnetic emanations. This involves protecting sensitive electronic equipment and communications from potential eavesdropping through the interception of radio frequency emissions that can leak from devices. TEMPEST standards are designed to safeguard against the unintentional release of information, which can occur through various forms of electromagnetic radiation emitted by devices such as computers, printers, and other electronic equipment.

The approaches used in TEMPEST countermeasures include shielding sensitive equipment and locations, using specialized enclosures, and implementing secure operating procedures to reduce the risk of signals being captured by unauthorized parties. By focusing on this aspect, TEMPEST aims to ensure that classified or sensitive information remains confidential and is not compromised through these electromagnetic emissions.