SilentGlass is a compact, easy-to-use HDMI device that prevents harmful communications from being transmitted through HDMI and DisplayPort signals.
This isn’t necessarily the kind of gadget you would want to set up on your personal computer, unless there are many unfamiliar individuals connecting devices to your desktop or laptop. However, it serves as an excellent choice for public computers, high-security settings, and environments where commercial use is prevalent — such as a computer located in a secluded office accessible to anyone. The NCSC reports that this device has already been implemented across U.K. government properties. It will soon be available for general purchase, especially benefiting those in “high-threat environments.”
On a technical level, the device hasn’t been released for global sale just yet. The NCSC has collaborated with Goldilock Labs, a cybersecurity firm based in the U.K., and the Sony UK Technology Centre to promote the product, but as of now, purchase links are not yet active.