When seeing is no longer believing and hearing can no longer be trusted, deepfake technology driven by rapid AI advancements is reshaping our perception of reality. Have you ever imagined that a familiar colleague or family member on your screen could be a virtual creation generated entirely by algorithms? As scam operations evolve into a deepfake era with astonishing realism, personal financial security, interpersonal trust, and corporate decision-making are facing unprecedented threats. How can we establish effective defenses against the challenges brought by generative AI? This is not merely a technical battle, but a crucial effort for the whole society to rebuild digital trust.