What are the valid considerations for TEMPEST guidance?

• A. Local weather conditions
• B. Realistic, validated local threats and cost effectiveness
• C. The average number of personnel on-site
• D. The layout of the facility

Answer: (B)

Considering TEMPEST guidance primarily revolves around protecting sensitive information from emanations that can be intercepted, it is essential to assess realistic, validated local threats and the cost-effectiveness of implementing protective measures. This consideration ensures that the security measures taken are appropriate and proportionate to the potential risks posed by those threats. Identifying specific threats that exist in the local environment allows organizations to tailor their strategies effectively, thereby maximizing their security posture without overspending on unnecessary protections.

Assessing local threats supports the rationale behind prioritizing resources and efforts towards the most significant risks, ensuring that protective measures align with the actual risks faced. Cost-effectiveness complements this by ensuring that resources allocated for security measures do not exceed the potential losses that could arise from a security breach. Thus, focusing on validated local threats and cost-effectiveness is critical in the realm of TEMPEST guidance.