Authenticity tech relies upon sensor-level fingerprints.
via PetaPixel: https://petapixel.com/2024/11/15/this-new-device-establishes-content-authenticity-using-any-digital-camera/
As a research physicist from MIT, Stuart Sevier learned a lot about reality, technology, and perhaps most importantly, the perception of reality. He veered off his hardcore academic track to pursue the concept of reality from a more engineering-based perspective, ultimately founding Atom Images and working with a talented team to build the Atom H1, a tool built for photographers to capture trusted, authentic images in a world where the line between real and fake is becoming blurrier by the day.
https://petapixel.com/2024/11/15/this-new-device-establishes-content-authenticity-using-any-digital-camera/