Protecting Your SCIF/SAPF: Understanding and Mitigating TEMPEST Concerns

February 19, 2025

When building a SCIF or SAPF, security goes beyond physical walls and soundproofing. A critical concern is TEMPEST: the study and mitigation of compromising emanations (CE). These are unintentional, intelligence-bearing radio frequency signals from electronic equipment that, if intercepted, could reveal sensitive information.

The Threat of Compromising Emanations:

Any electronic device, from laptops to servers, emits a unique "TEMPEST profile" or footprint. This footprint, radiating like a sphere, represents the range at which emanations can be detected. Commercially available equipment can capture and exploit these signals, posing a significant risk if the data processed is related to national security. Higher-powered equipment generally has a larger TEMPEST footprint.

TEMPEST Mitigations: A Critical Component:

A Certified TEMPEST Technical Authority (CTTA) is crucial in determining your facility's specific mitigation requirements. They will collaborate with your Site Security Manager (SSM) and Accrediting Official (AO) to assess factors like the volume of sensitive information, equipment TEMPEST profiles, and local threats. TEMPEST measures should only be implemented upon CTTA recommendation.

Common mitigations include:

• Grounding and Non-Conductive Breaks:  Preventing signals from traveling along metallic objects like pipes by grounding them or incorporating non-conductive sections.

• Shielding: Creating a "six-sided box" using foil or sheet metal within the perimeter walls, ceiling, and floor to block signal escape.

The CTTA may recommend other mitigations based on the required performance level (measured in RF decibels) and frequency ranges. TEMPEST mitigation needs vary significantly between projects.

Navigating the TEMPEST Review Process:

Securing a TEMPEST review can be a time-consuming process due to CTTA workload. However, it's an essential step for accreditation. Due to the complexity of TEMPEST, obtaining the correct information and approvals before construction is paramount.

Partnering for Success:

Meeting TEMPEST requirements and other security standards demands precision. Adamo's consulting services provide the expertise you need to ensure your facility is secure and compliant. Contact us today to learn how our experts can support your team.