The other day I was scrolling through some tech discussions when I stumbled across something that made me sit up and take notice. Cornell researchers have developed a method to embed invisible watermarks into video using light patterns – essentially turning every photon into a potential witness against deepfake fraud. It’s both brilliant and slightly unsettling at the same time.

The technique, called “noise-coded illumination,” works by subtly modulating light sources in a scene to create imperceptible patterns that cameras can capture. Think of it like a secret handshake between the lighting and the recording device – one that deepfake generators don’t know about yet. What struck me most was how elegantly simple yet complex this approach is. Instead of trying to detect fakes after they’re made, we’re essentially signing the original at the moment of creation.