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Difficulty: MediumPhysical Security Controls

A network technician is assigned to physically secure desktop computers located in a publicly accessible library area. Recent audits revealed that unauthorized users have been plugging hardware keyloggers into open USB ports on the back of the computer towers. The technician needs to prevent unauthorized physical connections to these ports without replacing the existing computer cases or restricting user access to connected peripherals. Which of the following physical security controls should the technician implement?

  1. Install physical USB port locks in all empty USB ports.Answer
  2. B
    Attach privacy filters to the desktop monitors.
  3. C
    Place bollards around the perimeter of the computer lab area.
  4. D
    Construct an access control vestibule at the entrance of the public library.

Answer

Install physical USB port locks in all empty USB ports.
Installing physical USB port locks (or port blockers) directly prevents unauthorized insertion of hardware keyloggers and rogue USB storage devices into empty interface ports on the workstation.

Step-by-Step Solution

1
Identify the physical security threat in the scenario.
The primary threat is unauthorized physical access to open hardware interfaces (USB ports) on computer towers in a public space.
An attacker can insert rogue hardware keyloggers or flash drives into exposed ports to compromise systems.
2
Evaluate the control options against the specific requirement to block port access without altering computer cases.
USB port locks directly block empty USB slots using a specialized key mechanism, effectively disabling physical hardware insertions.
This target-specific control prevents unauthorized device insertion while allowing existing keyboard and mouse connections to function.

Key Concept

Physical USB Port Blockers and Interface Security
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Topics

Physical Security Controls

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