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Difficulty: HardPhysical Security Controls and Environmental Measures

A network security team is designing physical and environmental security controls for a new high-security cryptographic key server enclosure located inside a multi-tenant facility. The facility audit identified two primary vulnerability vectors: potential physical access through shared drop-ceiling spaces into the server enclosure, and risk of electromagnetic eavesdropping (TEMPEST risks) on unshielded cryptographic hardware. Additionally, localized water pipe leakage under the raised floor must be detected immediately without placing electrical components at risk of direct contact with conductive standing water. Which of the following physical and environmental measures should the network security engineer implement to directly mitigate these identified risks? (Select TWO.)

  1. Extend structural walls slab-to-slab from the true floor to the structural ceiling and enclose the server room with a Faraday cage.Answer
  2. Install a non-conductive zone-based liquid leak detection sensing cable beneath the raised flooring tied to the environmental monitoring system.Answer
  3. C
    Deploy a high-volume wet-pipe sprinkler system directly above the server racks set to actuate immediately upon localized temperature elevation.
  4. D
    Configure single-hinged entry doors with interior request-to-exit infrared sensors to allow rapid egress without access log registration.
  5. E
    Lower relative humidity to under 15% across all server bays to eliminate condensation accumulation near sensitive busbars.

Answer

The network security engineer should extend structural walls slab-to-slab with a Faraday cage enclosure and deploy non-conductive liquid leak detection sensing cables beneath the raised flooring.
Building walls slab-to-slab (from concrete subfloor to the structural deck above) eliminates the perimeter security gap created by false drop ceilings. Implementing a Faraday cage blocks electromagnetic emissions (TEMPEST) from leaking outside the secured area. Furthermore, non-conductive liquid detection cables beneath raised floor tiles provide early warning of fluid accumulation before water damages electrical infrastructure.

Step-by-Step Solution

1
Analyze perimeter breach and RF leakage threats
Standard drop ceilings allow intruders to climb over partial walls. RF emissions allow interception of cryptographic operations.
Slab-to-slab wall construction eliminates overhead entry pathways, and a Faraday cage blocks electromagnetic signal emissions.
2
Evaluate sub-floor environmental moisture risks
Water pipe leaks under raised floors threaten electrical supply feeds and low-lying cabling.
Liquid sensing cables placed under raised floor tiles detect moisture presence immediately and alert monitoring systems prior to equipment contact.

Key Concept

Physical Perimeter Hardening, RF Shielding, and Environmental Leak Detection
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Topics

Physical Security Controls and Environmental Measures

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