Audio Diode - Always Open

Overview
Features
Specifications
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High Sec Lab’s Audio Diode mitigates the risks of eavesdropping when using peripheral audio devices by forcing unidirectional audio flow.

 

System Diagram

Audio Diode models addressed in this page:

  • FA10AO-4 - Audio Diode Analog to Analog w/o microphone support, always open
  • FA10BO-4 - Audio Diode USB to Analog w/o microphone support, always open

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The Threat of Using Audio Peripherals

Attackers can take control of an audio device to:

  • Listen in to classified or sensitive conversations in secure rooms.

  • Transfer data from secure to unsecured networks

The new HSL Audio Diode family of products connects between a source (a PC usually) and an audio device (speaker/ headphone). The Audio Diode prevents attackers from exploiting audio-data leakage.

Unidirectional Flow

The Audio Diode functions as a diode that forces audio signals from a PC to be unidirectional. This prevents hackers from manipulating a speaker/headphone to function as a microphone, for picking up surrounding conversations.

Low-Pass Filter

All sounds passing through the Audio Diode go through a low-pass filter that restricts the audio frequencies to the range compatible with the human ear. This prevents hackers from attacking by broadcasting high-frequency signals to an external hacking device.

 

Prevents hackers from taking advantage of audio-data leakage

The diode blocks listening in to surrounding conversations, by forcing unidirectional flow. It uses a low-pass filter to block high-frequency signal attacks.

Small size

The 85mm X 65mm X 34mm unit takes up almost no room on your desktop.

Easy to install and operate

Quickly connects to the host PC and audio device.

Unidirectional Flow

The Audio Diode functions as a diode that forces audio signals from a PC to be unidirectional. This prevents hackers from manipulating a speaker/headphone to function as a microphone, for picking up surrounding conversations.

Low-Pass Filter

All sounds passing through the Audio Diode go through a low-pass filter that restricts the audio frequencies to the range compatible with the human ear. This prevents hackers from attacking by broadcasting high-frequency signals to an external hacking device.

 

Audio Diode without microphone support

Model Number

FA10AO-4 FA10BO-4

Input Interface (Host)

Analog

USB 

Output Interface (Audio Device)

Analog

Analog 

Power (via USB)

5v@0.5A

Environmental

 

  • Temperature range: Operating - 0ºC to 40ºC (32ºF to 104ºF); Storage -20ºC to 60ºC (-4ºF to 140ºF)
  • Humidity: Operating - 20 to 80% non-condensing; Storage – 10 to 90% non-condensing
  • Altitude: 0 to 10,000 ft
 

Physical Characteristics

  • Dimensions: 85 (W) x 65 (D) x 34 (H) mm,
    3.1 (W) x 3.1 (D) x 2.4 (H) inch
  • Device weight: 185 gr (0.41 lbs.)
 
Model Description CPN
FA10AO-4 Audio Diode Analog to Analog without microphone support, always open CPN18098
FA10BO-4 Audio Diode USB to Analog without microphone support, always open CPN18097
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