High Sec Labs FA10BC-4 USB to Analog Audio Diode / Unidirectional Audio / Mic / Camera Support / Low-Pass Filter

Description

The FA10BC-4 Audio Diode is a compact security appliance that enforces one-way audio flow between a host PC and attached audio peripherals. It is designed to prevent audio-data leakage and to block unauthorized reverse-channel capture from speakers or headsets. The unit is intended for environments that require strict control over peripheral audio paths and data exfiltration risks.

Key features include enforced unidirectional audio flow, an integrated low-pass filter that limits transmitted frequencies to the human-audible range, and explicit microphone and camera support. Physical push buttons allow users to cut peripheral access while away from the workstation. The device is NIAP Common Criteria PP4.0 PSD certified and compliant, reflecting validated protections against peripheral sharing threats.

Technically, the FA10BC-4 connects a USB host to analog audio devices while preventing return audio paths and high-frequency signaling attacks. The low-pass filter blocks ultrasonic channels that could be used for covert signaling or exfiltration. The unit measures 85 x 65 x 34 mm and weighs 185 gr, operating across standard commercial temperature and humidity ranges.

Connectivity is straightforward and intended for direct inline deployment between a PC and speakers or headsets. The product provides explicit microphone support and a USB output option for cameras, enabling controlled peripheral use without introducing bidirectional audio risk. It is compatible with common USB host configurations and analog audio endpoints used in professional and secure settings.

Common applications include secure conference rooms, classified office environments, and government or defense facilities where preventing acoustic eavesdropping is critical. The device also suits desktop environments that require mitigation of covert audio channels and ultrasonic signaling attacks. It offers a simple hardware control point to reduce attack surface from peripheral devices.

Installation is plug-and-play and requires no special drivers or configuration for basic operation. The small footprint fits on crowded desks and in equipment racks where space is limited. Robust construction and certified compliance make it suitable for long-term, managed deployments where consistent unidirectional audio behavior is required.