Deepfakes, which usually involve superimposing someone's face and voice onto another person, started gaining attention a few years ago when adult websites began banning videos where the technique was used to add famous actresses' faces to porn stars' bodies.
https://www.techspot.com/news/96655-intel-detection-tool-uses-blood-flow-identify-deepfakes.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/96655-intel-detection-tool-uses-blood-flow-identify-deepfakes.html?utm_source=dlvr.it&utm_medium=blogger