TEMPEST in the context of SCI security refers to which concept?

• A. A set of security measures to prevent compromising emanations from equipment.
• B. A training program.
• C. A password policy.
• D. A device for encryption.

Answer: (C)

TEMPEST focuses on preventing compromising emanations—unintended signals emitted by equipment that could reveal sensitive information. It covers shielding and containment of devices, proper enclosures, careful cable routing, power filtering, and environmental controls, along with procedures to minimize emissions during operation. The aim is to ensure that signals from screens, printers, modems, or other hardware don’t become a channel for leakage of classified data. It isn’t about a training program, a password policy, or an encryption device, which address different security concerns.