Demo: LiShield: Create a Capture-Resistant Environment Against Photographing

Abstract

The ubiquity of mobile camera devices has been triggering an outcry of privacy concerns. In this demo, we introduce LiShield, which automatically protects a physical scene against photographing, by illuminating it with smart LEDs flickering in specialized waveform. We have also designed mechanisms to unblock authorized cameras and enable graceful degradation under strong ambient light interference.