LiShield Can Block Smartphone Cameras for Privacy’s Sake – IEEE Spectrum


Rules that prohibit photos or videos can prove almost impossible to enforce when nearly everyone carries a smartphone. But a new indoor privacy system has shown how the power of smart LED lighting could prevent people from taking illegal videos of a live events. LiShield has a capability to corrupt digital camera images and videos without interfering with human eyesight.

The prototype privacy measure uses a smart LED to give off a high-frequency flickering pattern that interferes with the camera sensors on mobile devices such as smartphones. Such flickering creates a vertical striped pattern effect in the photo or video frames taken by digital smartphone cameras without interfering with human eyesight or harming human eyes. 

Such a privacy system is imperceptible to human eyes because it uses high-frequency flickering patterns beyond the limits of human eye sensitivity at around 80 Hertz. The current LiShield prototype relies upon custom-built smart LED hardware and software. Even if bars do not make video unuseable, such barcodes could then be automatically detected by the online servers of social media networks.


Be the first to post a comment.

Leave a Comment

Your email address will not be published. Required fields are marked *