TEMPEST is a countermeasure of which COMSEC component?

TEMPEST refers to a set of standards and practices designed to protect against the unintentional emissions of electromagnetic signals from electronic devices, which can potentially reveal sensitive or classified information. This concept falls under the category of Emission Security, which is aimed at ensuring that unintentional signals do not compromise or leak secure information.

Emission Security is critical in environments where electronics are used for communication or data processing, as it mitigates the risks posed by interception of emanations. TEMPEST countermeasures might include shielding, filtering, and the physical layout of equipment to minimize the potential for compromising emanations.

The other options pertain to different aspects of security. Encryption Security focuses on protecting information through algorithms, physical security deals with protecting physical assets from unauthorized access, and Information Security encompasses broader measures for safeguarding information, including policies and procedures. While all these components are crucial for comprehensive security, TEMPEST specifically targets the protection of information through emission control, making it a distinct part of Emission Security.