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The recent development of Deep Neural Networks (DNN) has significantly increased the realism of AI-synthesized faces, with the most notable examples being the DeepFakes. In particular, DeepFake can synthesize the face of the target subject from the face of another subject, while retaining the same face attributes. With the increased number of social media portals, DeepFake videos rapidly spread through the Internet, causing a broad negative impact on society. Recent countermeasures to combat DeepFake focus on detection, a passive defense that is not able to prevent or slow down the generation of DeepFakes. Therefore in this paper, we focus on proactive defense and describe a new method named LandmarkBreaker, which is the first dedicated solution to obstruct the generation of DeepFake videos by disrupting facial landmark extraction, inspired by the observation that facial landmark extraction is an …