The UK’s National Cyber Security Centre has launched SilentGlass, a hardware device designed to block malicious traffic and prevent cyberattacks targeting HDMI and DisplayPort monitor connections.

Key Points

• SilentGlass is the first commercial hardware product engineered by the UK's National Cyber Security Centre (NCSC).
• The device is manufactured and sold by UK-based Goldilock Labs in partnership with Sony UK.
• It functions by identifying and blocking malicious data traffic between computers and displays via HDMI or DisplayPort cables.
• The technology was previously deployed within UK government estates to protect high-threat environments from potential espionage.
• The product is now available for purchase by private businesses and consumers to secure critical infrastructure.

Why it Matters

This release signals a shift toward treating physical hardware interfaces as critical security boundaries rather than trusted connections. While such attacks remain rare, the device provides a specialized defense for organizations handling sensitive data against sophisticated, state-sponsored espionage threats.