Deepfake, a blend of "deep learning" and "fake",[1] is an artificial intelligence-based human image synthesis technique. It is used to combine and superimpose existing images and videos onto source images or videos using a machine learning technique called a "generative adversarial network" (GAN).[2] The combination of the existing and source videos results in a fake video that shows a person or persons performing an action at an event that never occurred in reality.
Such fake videos can be created to, for example, alter the words or gestures a politician uses to make it look like that person said something they never did. [3] Deepfakes can also be used to create fake news and malicious hoaxes.[4][5 (Wikipedia, February 2019)